There are 529 fish that start with the letter H, from Haddock to Hypsypops rubicundus. Below you will find them listed alphabetically along with some general information about each. Click the toggle view buttons in the top right corner to switch between the card and the table view.
For each item you will find the following information
Order: The subclass the fish belongs to
Habitat: The places or type of weather the fish lives in
Scientific name: The designation that scientists use to catalog the species
Name: Haddock
Order: Gadiformes
Habitat: North Atlantic Ocean
Scientific name: Melanogrammus aeglefinus
Name: Hadrosaurus
Order: Characiformes
Habitat: Freshwater (South America)
Scientific name: Mylossoma duriventre
Name: Haemulon
Order: Perciformes
Habitat: Western Atlantic coral reefs
Scientific name: Haemulon album
Name: Hagfish
Order: Myxiniformes
Habitat: Deep temperate and tropical waters worldwide
Scientific name: Myxine glutinosa
Name: Hairfin Anchovy
Order: Clupeiformes
Habitat: Marine
Scientific name: Setipinna tenuifilis
Name: Hairfin Anthias
Order: Perciformes
Habitat: Coral reefs, Indo-Pacific
Scientific name: Anthias lee
Name: Hairfin Snapper
Order: Perciformes
Habitat: Coral reefs, Indo-Pacific
Scientific name: Lutjanus erythropterus
Name: Hairstreak Blenny
Order: Blenniiformes
Habitat: Coastal marine
Scientific name: Omobranchus halei
Name: Hairtail
Order: Perciformes
Habitat: Tropical and temperate waters worldwide
Scientific name: Trichiurus lepturus
Name: Hairtail Blenny
Order: Perciformes
Habitat: Coral reefs, Indo-Pacific
Scientific name: Xiphasia setifer
Name: Hairy Angler
Order: Lophiiformes
Habitat: Deep-sea, mesopelagic to bathypelagic
Scientific name: Caulophryne jordani
Name: Hairy Blenny
Order: Blenniiformes
Habitat: Coastal marine
Scientific name: Labrisomus nuchipinnis
Name: Hairy Frogfish
Order: Lophiiformes
Habitat: Coral reefs, tropical and subtropical waters
Scientific name: Antennarius striatus
Name: Hairy Mussel Blenny
Order: Perciformes
Habitat: Coastal, rocky shores, western Atlantic
Scientific name: Hypleurochilus arizonae
Name: Hairy Sea Horse
Order: Syngnathiformes
Habitat: Coral reefs, cryptic, Indo-Pacific
Scientific name: Hippocampus bargibanti
Name: Hairychin Flounder
Order: Pleuronectiformes
Habitat: Marine (Indo-Pacific)
Scientific name: Samaris cristatus
Name: Hairyfish
Order: Aulopiformes
Habitat: Deep-sea, mesopelagic
Scientific name: Scopelarchus analis
Name: Hakavale
Order: Perciformes
Habitat: Coastal, rocky reefs, New Zealand
Scientific name: Cheilodactylus spectabilis
Name: Hake
Order: Gadiformes
Habitat: Deep-sea, Atlantic and Pacific
Scientific name: Merlucciidae
Name: Hakea Cod
Order: Gadiformes
Habitat: Deep-sea, temperate Atlantic
Scientific name: Macruronus maderensis
Name: Hakeling
Order: Gadiformes
Habitat: Deep-sea, Atlantic
Scientific name: Laemonema goodebeanorum
Name: Hakes
Order: Gadiformes
Habitat: Marine
Scientific name: Merlucciidae
Name: Haku Lei
Order: Aulopiformes
Habitat: Marine (Indo-Pacific)
Scientific name: Aulopus filamentosus
Name: Half-banded Barb
Order: Cypriniformes
Habitat: Freshwater, flowing water, Southeast Asia
Scientific name: Barbodes semifasciolatus
Name: Half-banded Grouper
Order: Perciformes
Habitat: Coral reefs, Indo-Pacific
Scientific name: Epinephelus fasciatus
Name: Half-barred Flasher Wrasse
Order: Perciformes
Habitat: Coral reefs, Indo-Pacific
Scientific name: Paracheilinus cyaneus
Name: Half-barred Wrasse
Order: Perciformes
Habitat: Coral reefs, Indo-Pacific
Scientific name: Hemigymnus fasciatus
Name: Halfband Cardinalfish
Order: Perciformes
Habitat: Marine (Indo-Pacific)
Scientific name: Apogon semiornatus
Name: Halfbeak
Order: Beloniformes
Habitat: Tropical and subtropical waters worldwide
Scientific name: Hyporhamphus unifasciatus
Name: Halfmoon
Order: Perciformes
Habitat: Coastal, rocky reefs, eastern Pacific
Scientific name: Medialuna californiensis
Name: Halfmouth Sleeper
Order: Gobiiformes
Habitat: Freshwater/Brackish (Indo-Pacific)
Scientific name: Ophiocara porocephala
Name: Halfspine Cardinalfish
Order: Perciformes
Habitat: Coral reefs, Indo-Pacific
Scientific name: Apogon semiorbicularis
Name: Halibut
Order: Pleuronectiformes
Habitat: North Atlantic and Pacific Oceans
Scientific name: Hippoglossus hippoglossus
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Name: Halibut (Atlantic)
Order: Pleuronectiformes
Habitat: North Atlantic Ocean
Scientific name: Hippoglossus hippoglossus
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Name: Halibut (Pacific)
Order: Pleuronectiformes
Habitat: North Pacific Ocean
Scientific name: Hippoglossus stenolepis
Name: Hall's Blenny
Order: Perciformes
Habitat: Coral reefs, Indo-Pacific
Scientific name: Ecsenius halli
Name: Hall's Grunt
Order: Perciformes
Habitat: Marine
Scientific name: Pomadasys opercularis
Name: Hallas' Barbel
Order: Cypriniformes
Habitat: Freshwaters of Southeast Asia
Scientific name: Barbus hallasi
Name: Hallas's Cichlid
Order: Cichliformes
Habitat: Central America
Scientific name: Thorichthys hallasi
Name: Halmahera Cardinalfish
Order: Perciformes
Habitat: Coral reefs, Indo-Pacific
Scientific name: Apogon margaritophorus
Name: Halo Blenny
Order: Blenniiformes
Habitat: Coral reefs of the Indo-Pacific
Scientific name: Cirripectes auratus
Name: Halocynthia aurantium
Order: Stolidobranchia
Habitat: Benthic Arctic and subarctic waters
Scientific name: Halocynthia aurantium
Name: Halong
Order: Cypriniformes
Habitat: Freshwater (Asia)
Scientific name: Acrossocheilus hemispinus
Name: Hamacore
Order: Perciformes
Habitat: Coral reefs, Indo-Pacific
Scientific name: Lethrinus nebulosus
Name: Hamburger Triggerfish
Order: Tetraodontiformes
Habitat: Coral reefs, Indo-Pacific
Scientific name: Sufflamen bursa
Name: Hamerkop
Order: Cichliformes
Habitat: Freshwater
Scientific name: Haplochromis hamerkop
Name: Hamilton's Thryssa
Order: Clupeiformes
Habitat: Estuaries, coastal, Indo-Pacific
Scientific name: Thryssa hamiltonii
Name: Hamlet
Order: Perciformes
Habitat: Coral reefs, western Atlantic
Scientific name: Hypoplectrus
Name: Hammerbarbel
Order: Siluriformes
Habitat: Estuaries, coastal, Indo-Pacific
Scientific name: Tachysurus thalassinus
Name: Hammerhead Shark
Order: Carcharhiniformes
Habitat: Coastal and offshore warm temperate and tropical waters
Scientific name: Sphyrna mokarran
Name: Hammerhead Stickleback
Order: Gasterosteiformes
Habitat: Marine & Freshwater
Scientific name: Gasterosteus aculeatus
Name: Hammock Blenny
Order: Perciformes
Habitat: Coral reefs, Indo-Pacific
Scientific name: Omobranchus ferox
Name: Hampton's Carp
Order: Cypriniformes
Habitat: Freshwaters of West Africa
Scientific name: Labeo hamtoni
Name: Hapalogenys
Order: Perciformes
Habitat: Coastal, rocky reefs, western Pacific
Scientific name: Hapalogenys mucronatus
Name: Haplochromis
Order: Cichliformes
Habitat: African Great Lakes
Scientific name: Haplochromis sp.
Name: Hapuku
Order: Perciformes
Habitat: Marine
Scientific name: Polyprion oxygeneios
Name: Hardhead Catfish
Order: Siluriformes
Habitat: Coastal and and brackish waters of the Western Atlantic
Scientific name: Ariopsis felis
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Name: Hardhead Catfish (Atlantic)
Order: Siluriformes
Habitat: Marine & Brackish
Scientific name: Ariopsis felis
Name: Hardhead Sea Catfish
Order: Siluriformes
Habitat: Marine/Brackish (Western Atlantic)
Scientific name: Ariopsis felis
Name: Hardhead Silverside
Order: Atheriniformes
Habitat: Coastal waters of the Atlantic Ocean
Scientific name: Atherinomorus lacunosus
Name: Hardnose Shark
Order: Carcharhiniformes
Habitat: Coastal, tropical, Indo-Pacific
Scientific name: Carcharhinus macloti
Name: Hardtail Scad
Order: Carangiformes
Habitat: Pelagic marine
Scientific name: Megalaspis cordyla
Name: Hardyhead Silverside
Order: Atheriniformes
Habitat: Indo-Pacific
Scientific name: Atherinomorus lacunosus
Name: Harelip Barb
Order: Cypriniformes
Habitat: Freshwater, rivers, Southeast Asia
Scientific name: Osteochilus vittatus
Name: Harelip Blenny
Order: Blenniiformes
Habitat: Western Atlantic coral reefs
Scientific name: Ophioblennius atlanticus
Name: Harelip Sucker
Order: Cypriniformes
Habitat: Formerly Ohio and Mississippi River Basins (extinct)
Scientific name: Lagochila lacera
Name: Harlequin Bass
Order: Perciformes
Habitat: Coral reefs, western Atlantic
Scientific name: Serranus tigrinus
Name: Harlequin Filefish
Order: Tetraodontiformes
Habitat: Coral reefs of the Indo-Pacific
Scientific name: Oxymonacanthus longirostris
Name: Harlequin Grouper
Order: Perciformes
Habitat: Coral reefs, Indo-Pacific
Scientific name: Cephalopholis polleni
Name: Harlequin Hind
Order: Perciformes
Habitat: Coral reefs, Indo-Pacific
Scientific name: Cephalopholis argus
Name: Harlequin Sand Perch
Order: Perciformes
Habitat: Coastal, sandy bottoms, western Atlantic
Scientific name: Diplectrum formosum
Name: Harlequin Shark
Order: Carcharhiniformes
Habitat: Coastal marine
Scientific name: Carcharhinus signatus (regional name)
Name: Harlequin Shrimpfish
Order: Syngnathiformes
Habitat: Coral reefs, seagrass beds, Indo-Pacific
Scientific name: Aeoliscus strigatus
Name: Harlequin Sweetlips
Order: Perciformes
Habitat: Coral reefs of the Indo-Pacific
Scientific name: Plectorhinchus chaetodonoides
Name: Harp Sucker
Order: Cypriniformes
Habitat: Freshwater, western North America
Scientific name: Acrocheilus alutaceus
Name: Harpadon
Order: Aulopiformes
Habitat: Coastal, estuaries, Indo-Pacific
Scientific name: Harpadon nehereus
Name: Harpago
Order: Perciformes
Habitat: Deep waters of the Indo-Pacific
Scientific name: Harpago longirostris
Name: Harpoon Eel
Order: Anguilliformes
Habitat: Indo-Pacific coral reefs and seagrass beds
Scientific name: Moringua ferruginea
Name: Harpoon Seabass
Order: Perciformes
Habitat: Marine
Scientific name: Centropomus undecimalis
Name: Harpooner
Order: Perciformes
Habitat: Coastal marine
Scientific name: Anisotremus interruptus
Name: Harrington's Goby
Order: Perciformes
Habitat: Marine
Scientific name: Bathygobius soporator
Name: Harris Mudskipper
Order: Perciformes
Habitat: Brackish
Scientific name: Periophthalmus modestus
Name: Harrowed Sole
Order: Pleuronectiformes
Habitat: Marine
Scientific name: Atheresthes stomias
Name: Harry's Blenny
Order: Perciformes
Habitat: Coral reefs, Indo-Pacific
Scientific name: Ecsenius collettei
Name: Hart's Rivulus
Order: Cyprinodontiformes
Habitat: Freshwater, streams, Trinidad and Tobago
Scientific name: Rivulus hartii
Name: Harvest Butterfish
Order: Perciformes
Habitat: Coastal marine
Scientific name: Peprilus triacanthus
Name: Harvester Sucker
Order: Cypriniformes
Habitat: Freshwater, rivers, central North America
Scientific name: Moxostoma congestum
Name: Harvestfish
Order: Perciformes
Habitat: Coastal marine
Scientific name: Peprilus alepidotus
Name: Hatchet Molly
Order: Cyprinodontiformes
Habitat: Freshwater, brackish, Central America
Scientific name: Poecilia sphenops
Name: Hatchetfish
Order: Stomiiformes
Habitat: Deep mesopelagic and bathypelagic waters worldwide
Scientific name: Argyropelecus hemigymnus
Name: Hatchfish
Order: Stomiiformes
Habitat: Deep ocean waters
Scientific name: Sternoptychidae
Name: Haustellum
Order: Perciformes
Habitat: Marine (Indo-Pacific)
Scientific name: Haustellum scorpio
Name: Hawaii Damselfish
Order: Perciformes
Habitat: Marine
Scientific name: Abudefduf abdominalis
Name: Hawaiian Barred Knifejaw
Order: Perciformes
Habitat: Coastal, rocky reefs, Hawaii
Scientific name: Oplegnathus fasciatus
Name: Hawaiian Bigeye
Order: Priacanthiformes
Habitat: Reefs, Hawaii
Scientific name: Priacanthus meeki
Name: Hawaiian Black Marlin
Order: Istiophoriformes
Habitat: Pelagic, tropical Indo-Pacific
Scientific name: Makaira mazara
Name: Hawaiian Conger
Order: Anguilliformes
Habitat: Coastal marine
Scientific name: Conger marginatus
Name: Hawaiian Dascyllus
Order: Perciformes
Habitat: Coral reefs, Hawaii
Scientific name: Dascyllus albisella
Name: Hawaiian Dragon Moray
Order: Anguilliformes
Habitat: Coral reefs, Hawaii
Scientific name: Enchelycore pardalis
Name: Hawaiian Flagtail
Order: Perciformes
Habitat: Coastal, Hawaii
Scientific name: Kuhlia sandvicensis
Name: Hawaiian Flounder
Order: Pleuronectiformes
Habitat: Coastal marine
Scientific name: Engyprosopon hawaiiensis
Name: Hawaiian Flyingfish
Order: Beloniformes
Habitat: Pelagic, Hawaii
Scientific name: Cheilopogon atrisignis
Name: Hawaiian Goldfish
Order: Perciformes
Habitat: Marine (Pacific)
Scientific name: Pristipomoides auricilla
Name: Hawaiian Green Lionfish
Order: Scorpaeniformes
Habitat: Hawaii"
Scientific name: Pterois sp."Coral reefs
Name: Hawaiian Gregory
Order: Perciformes
Habitat: Coral reefs, Hawaii
Scientific name: Stegastes marginatus
Name: Hawaiian Hogfish
Order: Perciformes
Habitat: Reefs, Hawaii
Scientific name: Bodianus albotaeniatus
Name: Hawaiian Ladyfish
Order: Elopiformes
Habitat: Coastal, estuaries, Hawaii
Scientific name: Elops hawaiiensis
Name: Hawaiian Lizardfish
Order: Aulopiformes
Habitat: Coastal marine
Scientific name: Synodus ulae
Name: Hawaiian Monkfish
Order: Lophiiformes
Habitat: Marine (Pacific)
Scientific name: Lophius setigerus
Name: Hawaiian Moray
Order: Anguilliformes
Habitat: Coral reefs, Hawaii
Scientific name: Gymnothorax meleagris
Name: Hawaiian Mullet
Order: Mugiliformes
Habitat: Coastal, estuaries, Hawaii
Scientific name: Mugil cephalus
Name: Hawaiian Peppered Moray
Order: Anguilliformes
Habitat: Coral reefs, Hawaii
Scientific name: Gymnothorax picta
Name: Hawaiian Searobin
Order: Perciformes
Habitat: Coastal marine
Scientific name: Pterygotrigla picta
Name: Hawaiian Sergeant
Order: Perciformes
Habitat: Tropical reefs of the Hawaiian Islands
Scientific name: Abudefduf abdominalis
Name: Hawaiian Sergeant Major
Order: Perciformes
Habitat: Coral reefs, Hawaii
Scientific name: Abudefduf abdominalis
Name: Hawaiian Slingjaw Wrasse
Order: Perciformes
Habitat: Coral reefs, Hawaii
Scientific name: Epibulus insidiator
Name: Hawaiian Snake Eel
Order: Anguilliformes
Habitat: Sandy bottoms, Hawaii
Scientific name: Ophichthus uropunctatus
Name: Hawaiian Squirrelfish
Order: Holocentriformes
Habitat: Coral reefs, Hawaii
Scientific name: Sargocentron xantherythrum
Name: Hawaiian Swordfish
Order: Istiophoriformes
Habitat: Pelagic, Hawaii
Scientific name: Xiphias gladius
Name: Hawaiian Tilefish
Order: Perciformes
Habitat: Sandy bottoms, Hawaii
Scientific name: Malacanthus hoedtii
Name: Hawaiian Trumpetfish
Order: Syngnathiformes
Habitat: Coral reefs, Hawaii
Scientific name: Aulostomus chinensis
Name: Hawaiian Warriorfish
Order: Perciformes
Habitat: Coral reefs, Hawaii
Scientific name: Acanthurus nigricans
Name: Hawkfish
Order: Perciformes
Habitat: Coral reefs of the Indo-Pacific
Scientific name: Cirrhitichthys falco
Name: Hawkfish Blenny
Order: Perciformes
Habitat: Coral reefs, Indo-Pacific
Scientific name: Cirripectes castaneus
Name: Hawksbill Sea Turtle
Order: Testudines
Habitat: Marine (tropical/subtropical oceans)
Scientific name: Eretmochelys imbricata
Name: Hawksbill Triggerfish
Order: Tetraodontiformes
Habitat: Marine
Scientific name: Sufflamen bursa
Name: Hazel Blenny
Order: Perciformes
Habitat: Coastal, rocky shores, Mediterranean
Scientific name: Parablennius gattorugine
Name: Head-barred Sandperch
Order: Perciformes
Habitat: Sandy bottoms, Indo-Pacific
Scientific name: Parapercis clathrata
Name: Headed Gourami
Order: Anabantiformes
Habitat: Freshwaters of Southeast Asia
Scientific name: Osphronemus gouramy
Name: Headlight Anglerfish
Order: Lophiiformes
Habitat: Marine (deep sea)
Scientific name: Linophryne lucifer
Name: Headsail Orcafish
Order: Lampriformes
Habitat: Deep-sea, mesopelagic
Scientific name: Stylephorus chordatus
Name: Headshield Catfish
Order: Siluriformes
Habitat: Freshwater, South America
Scientific name: Cephalius macrurus
Name: Headstander
Order: Characiformes
Habitat: Freshwater rivers of South America
Scientific name: Anostomus anostomus
Name: Heard Island Icefish
Order: Perciformes
Habitat: Marine
Scientific name: Channichthys rhinoceratus
Name: Heater
Order: Perciformes
Habitat: Coastal waters of the western Atlantic Ocean
Scientific name: Cynoscion regalis
Name: Heavenly Emperor
Order: Perciformes
Habitat: Marine
Scientific name: Symphysanodon typus
Name: Heavily-barred Sandperch
Order: Perciformes
Habitat: Sandy bottoms, Indo-Pacific
Scientific name: Parapercis tetracantha
Name: Heavy-jawed Seabream
Order: Perciformes
Habitat: Coastal, rocky reefs, eastern Atlantic
Scientific name: Pagellus bogaraveo
Name: Heavythread Bream
Order: Perciformes
Habitat: Sandy bottoms, Indo-Pacific
Scientific name: Nemipterus marginatus
Name: Hecht's Cichlid
Order: Cichliformes
Habitat: Freshwater, Central America
Scientific name: Thorichthys hecko
Name: Hecklefish
Order: Perciformes
Habitat: Western Atlantic and Caribbean coastal
Scientific name: Centropomus undecimalis
Name: Hector's Goby
Order: Gobiiformes
Habitat: Coral reefs, Indo-Pacific
Scientific name: Koumansetta hectori
Name: Heel-spot Cardinalfish
Order: Perciformes
Habitat: Coral reefs, Indo-Pacific
Scientific name: Apogon kallopterus
Name: Helco Anglerfish
Order: Lophiiformes
Habitat: Coral reefs, western Atlantic
Scientific name: Antennarius sanguineus
Name: Helecine
Order: Perciformes
Habitat: Marine (Western Atlantic)
Scientific name: Symphurus plagiusa
Name: Helen's Halfbeak
Order: Beloniformes
Habitat: Western Atlantic shallow waters
Scientific name: Hyporhamphus rolandi
Name: Helena Catfish
Order: Siluriformes
Habitat: South American freshwaters
Scientific name: Helogenes marmoratus
Name: Helicolenus
Order: Scorpaeniformes
Habitat: Marine (Atlantic)
Scientific name: Helicolenus dactylopterus
Name: Helicoprion
Order: Eugeneodontiformes
Habitat: Extinct (Permian)
Scientific name: Helicoprion bessonowi
Name: Helmet Gurnard
Order: Perciformes
Habitat: Tropical Indo-Pacific waters
Scientific name: Dactyloptena orientalis
Name: Helmet Perch
Order: Perciformes
Habitat: Marine
Scientific name: Hoplolatilus fronticinctus
Name: Helmet Seabream
Order: Spariformes
Habitat: Marine
Scientific name: Chrysoblephus laticeps
Name: Helmet Triggerfish
Order: Tetraodontiformes
Habitat: Coral reefs, Indo-Pacific
Scientific name: Balistes galeus
Name: Helostoma Gourami
Order: Anabantiformes
Habitat: Freshwaters of Southeast Asia
Scientific name: Helostoma temminckii
Name: Helotes
Order: Perciformes
Habitat: Coastal, Indo-Pacific
Scientific name: Helotes sexlineatus
Name: Hemanthous Scorpionfish
Order: Scorpaeniformes
Habitat: Marine
Scientific name: Scorpaena hemiptera
Name: Hemiancistrus
Order: Siluriformes
Habitat: South American freshwaters
Scientific name: Hemiancistrus sp.
Name: Hemibagrus
Order: Siluriformes
Habitat: Southeast Asian freshwaters
Scientific name: Hemibagrus nemurus
Name: Hemibarbus
Order: Cypriniformes
Habitat: Freshwater
Scientific name: Hemibarbus
Name: Hemibrycon
Order: Characiformes
Habitat: Freshwater, South America
Scientific name: Hemibrycon gibbosus
Name: Hemichromis
Order: Cichliformes
Habitat: Freshwater, Africa
Scientific name: Hemichromis bimaculatus
Name: Hemichromis elongatus
Order: Cichliformes
Habitat: Freshwater
Scientific name: Hemichromis elongatus
Name: Hemidoras
Order: Siluriformes
Habitat: Freshwater
Scientific name: Hemidoras
Name: Hemigrammus
Order: Characiformes
Habitat: Freshwater, South America
Scientific name: Hemigrammus rhodostomus
Name: Hemilepidotus
Order: Scorpaeniformes
Habitat: Coastal, North Pacific
Scientific name: Hemilepidotus spinosus
Name: Hemiodus
Order: Characiformes
Habitat: Freshwater, South America
Scientific name: Hemiodus quadrimaculatus
Name: Hemipimelodus
Order: Siluriformes
Habitat: Freshwater, New Guinea
Scientific name: Hemipimelodus papuensis
Name: Hemiplagia
Order: Lophiiformes
Habitat: Marine
Scientific name: Hemiplagia
Name: Hemiplectrus
Order: Perciformes
Habitat: Coastal, Indo-Pacific
Scientific name: Hemiplectrus macropterus
Name: Hemipteronotus
Order: Perciformes
Habitat: Marine
Scientific name: Hemipteronotus
Name: Hemiramphodon
Order: Beloniformes
Habitat: Freshwater & Brackish
Scientific name: Hemiramphodon
Name: Hemiramphus
Order: Beloniformes
Habitat: Coastal, Indo-Pacific
Scientific name: Hemiramphus far
Name: Hemiscyllium
Order: Orectolobiformes
Habitat: Coral reefs, Indo-Pacific
Scientific name: Hemiscyllium ocellatum
Name: Hemispherical Batfish
Order: Ephippiformes
Habitat: Marine
Scientific name: Platax orbicularis
Name: Hemitaurichthys
Order: Perciformes
Habitat: Coral reefs, Indo-Pacific
Scientific name: Hemitaurichthys polylepis
Name: Hemitilapia
Order: Cichliformes
Habitat: Lake Malawi
Scientific name: Hemitilapia oxyrhyncha
Name: Hemitrygon
Order: Myliobatiformes
Habitat: Coastal, Western Pacific
Scientific name: Hemitrygon akajei
Name: Hemitrygon akajei
Order: Myliobatiformes
Habitat: Marine
Scientific name: Hemitrygon akajei
Name: Hemochromis
Order: Perciformes
Habitat: Freshwater, Africa
Scientific name: Hemochromis rufiventris
Name: Hendecanchus
Order: Acanthuriformes
Habitat: Deep-water, Indo-Pacific
Scientific name: Hendecanchus schneideri
Name: Hendricks' Silverside
Order: Atheriniformes
Habitat: Marine & Brackish
Scientific name: Menidia beryllina
Name: Heng's Rasbora
Order: Cypriniformes
Habitat: Freshwater
Scientific name: Rasbora hengelo
Name: Hengeli Rasbora
Order: Cypriniformes
Habitat: Freshwater, Southeast Asia
Scientific name: Rasbora hengeli
Name: Henshaw's Goby
Order: Gobiiformes
Habitat: Coastal, rocky shores, Mediterranean
Scientific name: Gobius henshawi
Name: Hepatus
Order: Perciformes
Habitat: Deep-water, Indo-Pacific
Scientific name: Hepatus epinophorus
Name: Heptapterus
Order: Siluriformes
Habitat: Freshwater, South America
Scientific name: Heptapterus mustelinus
Name: Heptastichius
Order: Perciformes
Habitat: Indo-Pacific"
Scientific name: Heptastichius sp."Deep-water
Name: Herald Perchlet
Order: Perciformes
Habitat: Marine/Brackish (Indo-Pacific)
Scientific name: Ambassis vachellii
Name: Herbivorous Catfish
Order: Siluriformes
Habitat: Freshwater
Scientific name: Panaque armbrusteri
Name: Herkul's Dragonet
Order: Syngnathiformes
Habitat: Deep-water, Indo-Pacific
Scientific name: Synchiropus herculaneus
Name: Hermatobates
Order: Perciformes
Habitat: Marine (Indo-Pacific)
Scientific name: Bathygobius fuscus
Name: Hermitfish
Order: Perciformes
Habitat: Coral reefs, Indo-Pacific (general term)
Scientific name: Apogonidae
Name: Herring
Order: Clupeiformes
Habitat: Temperate and subarctic waters of the North Atlantic and Pacific
Scientific name: Clupea harengus
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Name: Herring (Atlantic)
Order: Clupeiformes
Habitat: Marine
Scientific name: Clupea harengus
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Name: Herring (Pacific)
Order: Clupeiformes
Habitat: Marine
Scientific name: Clupea pallasii
Name: Herring Eel
Order: Anguilliformes
Habitat: Coastal, Atlantic
Scientific name: Conger oceanicus
Name: Herring Scad
Order: Carangiformes
Habitat: Marine
Scientific name: Atule mate
Name: Herring Smelt
Order: Osmeriformes
Habitat: Coastal, North Atlantic and Pacific
Scientific name: Mallotus villosus
Name: Herzenstein's Boxfish
Order: Tetraodontiformes
Habitat: Coral reefs, Indo-Pacific
Scientific name: Ostracion rhinorhynchos
Name: Hesperichthys
Order: Cypriniformes
Habitat: Freshwater
Scientific name: Hesperichthys
Name: Heterandria
Order: Cyprinodontiformes
Habitat: Freshwater, North America
Scientific name: Heterandria formosa
Name: Heterenchelys
Order: Anguilliformes
Habitat: Deep-sea, Indo-Pacific
Scientific name: Heterenchelys longipinna
Name: Heterobranchus
Order: Siluriformes
Habitat: Freshwater, Africa
Scientific name: Heterobranchus longifilis
Name: Heterocercal Shark
Order: Carcharhiniformes
Habitat: Marine
Scientific name: Heterocercal Sharks (various species)
Name: Heteroconger
Order: Anguilliformes
Habitat: Coral reefs, burrowing, Indo-Pacific
Scientific name: Heteroconger hassi
Name: Heterodontus
Order: Heterodontiformes
Habitat: Coastal, eastern Pacific
Scientific name: Heterodontus francisci
Name: Heteroeleptris
Order: Gobiiformes
Habitat: Deep-water, Indo-Pacific
Scientific name: Heteroeleptris vulgaris
Name: Heteromycteris
Order: Pleuronectiformes
Habitat: Coastal, Indo-Pacific
Scientific name: Heteromycteris hartzfeldii
Name: Heteropneustes
Order: Siluriformes
Habitat: Freshwater, South Asia
Scientific name: Heteropneustes fossilis
Name: Heteropriacanthus
Order: Perciformes
Habitat: Coral reefs, tropical
Scientific name: Heteropriacanthus cruentatus
Name: Heterosmilodon
Order: Lampriformes
Habitat: Deep-sea, Indo-Pacific
Scientific name: Heterosmilodon bicornutus
Name: Heterotis
Order: Osteoglossiformes
Habitat: Freshwater
Scientific name: Heterotis niloticus
Name: Hexafish
Order: Orectolobiformes
Habitat: Marine
Scientific name: Brachaelurus waddi
Name: Hexagrammos
Order: Hexagrammiformes
Habitat: North Pacific waters
Scientific name: Hexagrammos decagrammus
Name: Hexanchus
Order: Hexanchiformes
Habitat: Deep-sea, cosmopolitan
Scientific name: Hexanchus griseus
Name: Hexanchus griseus
Order: Hexanchiformes
Habitat: Marine
Scientific name: Hexanchus griseus
Name: Hexanchus microperus
Order: Hexanchiformes
Habitat: Marine
Scientific name: Hexanchus microperus
Name: Hexanchus nakamurae
Order: Hexanchiformes
Habitat: Marine
Scientific name: Hexanchus nakamurae
Name: Hexanchus peruanus
Order: Hexanchiformes
Habitat: Marine
Scientific name: Hexanchus peruanus
Name: Hexanchus vitulus
Order: Hexanchiformes
Habitat: Deep temperate and tropical waters worldwide
Scientific name: Hexanchus vitulus
Name: Hexanematichthys
Order: Siluriformes
Habitat: Marine and brackish waters of the Indo-Pacific
Scientific name: Hexanematichthys leptocanthus
Name: Hexapleura
Order: Pleuronectiformes
Habitat: Deep-water, Indo-Pacific
Scientific name: Hexapleura microtis
Name: Hexaprotodon
Order: Loricariiformes
Habitat: Freshwater (Extinct)
Scientific name: Hexaprotodon
Name: Hexatrygon
Order: Myliobatiformes
Habitat: Deep-sea, Indo-Pacific
Scientific name: Hexatrygon bruuni
Name: Hibiscus Triggerfish
Order: Tetraodontiformes
Habitat: Coral reefs, Indo-Pacific
Scientific name: Sufflamen bursa
Name: Hickory Shad
Order: Clupeiformes
Habitat: Anadromous, eastern North America
Scientific name: Alosa mediocris
Name: Hidefisch
Order: Perciformes
Habitat: Deep-water, Indo-Pacific
Scientific name: Pristigenys serrula
Name: High Snout Catfish
Order: Siluriformes
Habitat: Estuaries, coastal, Indo-Pacific
Scientific name: Otolithoides biauritus
Name: High-Heel Catfish
Order: Siluriformes
Habitat: Freshwater, South America
Scientific name: Pimelodus blochii
Name: High-backed Catfish
Order: Siluriformes
Habitat: Marine & Brackish
Scientific name: Arius dussumieri
Name: High-backed Drum
Order: Pempheriformes
Habitat: Western Atlantic reefs
Scientific name: Pempheris schomburgkii
Name: High-finned Grouper
Order: Perciformes
Habitat: Marine
Scientific name: Mycteroperca bonaci
Name: High-finned Loach
Order: Cypriniformes
Habitat: Freshwater
Scientific name: Botia dario
Name: High-finned Pickerel
Order: Esociformes
Habitat: Freshwater
Scientific name: Esox americanus vermiculatus
Name: High-finned Shad
Order: Clupeiformes
Habitat: Marine & Freshwater
Scientific name: Alosa sapidissima
Name: High-finned Skilfish
Order: Scorpaeniformes
Habitat: Marine
Scientific name: Erilepis zonifer
Name: High-finned Sole
Order: Pleuronectiformes
Habitat: Marine
Scientific name: Psettodes erumei
Name: High-hat
Order: Perciformes
Habitat: Coastal marine
Scientific name: Equetus acuminatus
Name: High-yellow Tang
Order: Acanthuriformes
Habitat: Marine
Scientific name: Zebrasoma flavescens
Name: Highback Snapper
Order: Perciformes
Habitat: Coral reefs, Indo-Pacific
Scientific name: Lutjanus gibbus
Name: Highbrow Goby
Order: Gobiiformes
Habitat: Coral reefs, Indo-Pacific
Scientific name: Gobiodon ceramensis
Name: Highfin Amberjack
Order: Perciformes
Habitat: Pelagic, tropical and temperate
Scientific name: Seriola rivoliana
Name: Highfin Basslet
Order: Perciformes
Habitat: Deep-water, Caribbean
Scientific name: Lipogramma klayi
Name: Highfin Blenny
Order: Perciformes
Habitat: Coastal, rocky shores, Mediterranean
Scientific name: Aidablennius sphynx
Name: Highfin Cardinalfish
Order: Perciformes
Habitat: Coral reefs, Indo-Pacific
Scientific name: Apogon hartzfeldi
Name: Highfin Carpsucker
Order: Cypriniformes
Habitat: Freshwater
Scientific name: Carpiodes velifer
Name: Highfin Chimaera
Order: Chimaeriformes
Habitat: Deep waters worldwide
Scientific name: Harriotta raleighana
Name: Highfin Coris
Order: Perciformes
Habitat: Coral reefs, Indo-Pacific
Scientific name: Coris gaimard
Name: Highfin Grouper
Order: Perciformes
Habitat: Indo-Pacific coral reefs
Scientific name: Epinephelus altivelis
Name: Highfin Lizardfish
Order: Aulopiformes
Habitat: Sandy bottoms, Indo-Pacific
Scientific name: Synodus lacertinus
Name: Highfin Loach
Order: Cypriniformes
Habitat: Freshwaters of Southeast Asia
Scientific name: Botia modesta
Name: Highfin Soapfish
Order: Perciformes
Habitat: Coral reefs, Indo-Pacific
Scientific name: Grammistes sexlineatus
Name: Highfin Spadefish
Order: Perciformes
Habitat: Coastal, western Atlantic
Scientific name: Chaetodipterus faber
Name: Highfin Tilefish
Order: Perciformes
Habitat: Rubbly bottoms, Indo-Pacific
Scientific name: Hoplolatilus starcki
Name: Highhat
Order: Perciformes
Habitat: Tropical Western Atlantic reefs
Scientific name: Equetus acuminatus
Name: Highlight Goby
Order: Gobiiformes
Habitat: Western Atlantic coral reefs
Scientific name: Elacatinus multifasciatus
Name: Highwater Maned Blenny
Order: Perciformes
Habitat: Coastal, rocky shores, Indo-Pacific
Scientific name: Salarias fasciatus
Name: Hildebrand's Anchovy
Order: Clupeiformes
Habitat: Coastal, eastern Pacific
Scientific name: Engraulis mordax
Name: Hillstream Loach
Order: Cypriniformes
Habitat: Fast-flowing freshwaters in Asia
Scientific name: Balitoridae
Name: Hilsa
Order: Clupeiformes
Habitat: Estuaries and coastal waters of the Indo-Pacific
Scientific name: Tenualosa ilisha
Name: Hilsa Shad
Order: Clupeiformes
Habitat: Anadromous, Indo-Pacific
Scientific name: Tenualosa ilisha
Name: Himalayan Golden Mahseer
Order: Cypriniformes
Habitat: Freshwater
Scientific name: Tor putitora
Name: Himalayan Pit Viper
Order: Perciformes
Habitat: Freshwater, Africa (introduced)
Scientific name: Oreochromis niloticus
Name: Himantura
Order: Myliobatiformes
Habitat: Indo-Pacific marine and brackish waters
Scientific name: Himantura uarnak
Name: Hind
Order: Perciformes
Habitat: Coral reefs, tropical and subtropical (general term)
Scientific name: Epinephelus
Name: Hingebeak Shrimpfish
Order: Syngnathiformes
Habitat: Coral reefs, seagrass beds, Indo-Pacific
Scientific name: Aeoliscus strigatus
Name: Hippocampus
Order: Syngnathiformes
Habitat: Seagrass, coral reefs (general term for seahorse)
Scientific name: Hippocampus
Name: Hippocampus kuda
Order: Syngnathiformes
Habitat: Indo-Pacific marine waters
Scientific name: Hippocampus kuda
Name: Hippocampus reidi
Order: Syngnathiformes
Habitat: Western Atlantic marine
Scientific name: Hippocampus reidi
Name: Hippoglossina
Order: Pleuronectiformes
Habitat: Deep-water, eastern Pacific
Scientific name: Hippoglossina stomata
Name: Hippoglossoides
Order: Pleuronectiformes
Habitat: Deep-water, North Atlantic
Scientific name: Hippoglossoides platessoides
Name: Hippoglossus
Order: Pleuronectiformes
Habitat: North Atlantic Ocean
Scientific name: Hippoglossus hippoglossus
Name: Hippopede
Order: Perciformes
Habitat: Freshwater (Africa)
Scientific name: Hippopotamus amphibius
Name: Hippopotamus Fish
Order: Mormyriformes
Habitat: Freshwater, Africa
Scientific name: Mormyrops anguilloides
Name: Hipposcarus
Order: Perciformes
Habitat: Indo-Pacific coral reefs
Scientific name: Hipposcarus longiceps
Name: Hiretail Frogfish
Order: Lophiiformes
Habitat: Coral reefs, Indo-Pacific
Scientific name: Antennarius analis
Name: Hirondellea
Order: Zoarciformes
Habitat: Deep-sea, abyssal
Scientific name: Hirondellea gigas
Name: Histiophryne
Order: Lophiiformes
Habitat: Marine (Indo-Pacific)
Scientific name: Histiophryne psychedelica
Name: Histiopterus
Order: Perciformes
Habitat: Indo-Pacific marine
Scientific name: Histiopterus typus
Name: Histrio histrio
Order: Lophiiformes
Habitat: Sargassum weed in tropical and subtropical waters worldwide
Scientific name: Histrio histrio
Name: Hoary Batfish
Order: Tetraodontiformes
Habitat: Coastal, Indo-Pacific
Scientific name: Platax boersii
Name: Hobbs' Anchovy
Order: Engraulidae
Habitat: Eastern Pacific Ocean
Scientific name: Anchoa hobbsi
Name: Hog Choker
Order: Pleuronectiformes
Habitat: Marine & Freshwater
Scientific name: Trinectes maculatus
Name: Hog Mackerel
Order: Perciformes
Habitat: Pelagic marine
Scientific name: Decapterus macarellus
Name: Hogchoker
Order: Pleuronectiformes
Habitat: Western Atlantic and Caribbean coastal waters
Scientific name: Trinectes maculatus
Name: Hogfish
Order: Perciformes
Habitat: Reefs and rocky bottoms of the Western Atlantic
Scientific name: Lachnolaimus maximus
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Name: Hogfish (Cuban)
Order: Labriformes
Habitat: Marine
Scientific name: Bodianus rufus
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Name: Hogfish (Spanish)
Order: Labriformes
Habitat: Marine
Scientific name: Bodianus scrofa
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Name: Hogfish (Yellow)
Order: Labriformes
Habitat: Marine
Scientific name: Bodianus sagittarius
Name: Hogfish Snapper
Order: Perciformes
Habitat: Coral reefs, Indo-Pacific
Scientific name: Lethrinus miniatus
Name: Hogun Blenny
Order: Perciformes
Habitat: Coastal, rocky shores, Mediterranean
Scientific name: Parablennius gattorugine
Name: Hoki
Order: Gadiformes
Habitat: Offshore waters of New Zealand and southern Australia
Scientific name: Macruronus novaezelandiae
Name: Holacanthus
Order: Perciformes
Habitat: Coral reefs, western Atlantic
Scientific name: Holacanthus ciliaris
Name: Holcomycteronus
Order: Ophidiiformes
Habitat: Deep-sea, abyssal
Scientific name: Holcomycteronus profundissimus
Name: Holdfast Clinid
Order: Blenniiformes
Habitat: Coastal, rocky shores, South Africa
Scientific name: Clinus superciliousus
Name: Hole-in-the-head Goby
Order: Gobiiformes
Habitat: Sandy bottoms, Indo-Pacific
Scientific name: Signigobius biocellatus
Name: Holland's Bream
Order: Perciformes
Habitat: Indo-Pacific marine
Scientific name: Argyrops sp.
Name: Holland's Goby
Order: Perciformes
Habitat: Marine & Brackish
Scientific name: Gobius niger
Name: Hollandichthys
Order: Characiformes
Habitat: Southeastern Brazil
Scientific name: Hollandichthys multifasciatus
Name: Hollardia
Order: Tetraodontiformes
Habitat: Marine
Scientific name: Hollardia
Name: Holobenthos
Order: Batrachoidiformes
Habitat: Marine
Scientific name: Holobenthos
Name: Holocanthus clarionensis
Order: Perciformes
Habitat: Marine (Pacific)
Scientific name: Holacanthus clarionensis
Name: Holocentrus
Order: Holocentriformes
Habitat: Coral reefs, tropical Atlantic
Scientific name: Holocentrus adscensionis
Name: Holocentrus rufus
Order: Holocentriformes
Habitat: Marine (Atlantic)
Scientific name: Holocentrus rufus
Name: Holocentrus vexillarius
Order: Holocentriformes
Habitat: Marine (Atlantic)
Scientific name: Holocentrus vexillarius
Name: Holocephali
Order: Chimaeriformes
Habitat: Deep-sea, temperate and cold waters
Scientific name: Chimaera monstrosa
Name: Holocephalus
Order: Chimaeriformes
Habitat: Deep-sea
Scientific name: Holocephalus sp.
Name: Holocnemus
Order: Araneae
Habitat: Terrestrial (Not a fish – correction for potential misidentification)
Scientific name: Holocnemus pluchei
Name: Holocynus
Order: Characiformes
Habitat: Freshwater
Scientific name: Holocynus
Name: Holohalaelurus
Order: Carcharhiniformes
Habitat: Deep-sea, eastern Atlantic
Scientific name: Holohalaelurus regani
Name: Holonema
Order: Chimaeriformes
Habitat: Marine (deep sea)
Scientific name: Holonema rugosum
Name: Homaloptera
Order: Cypriniformes
Habitat: Freshwater, Southeast Asia
Scientific name: Homaloptera stephensoni
Name: Homeric Mudskipper
Order: Perciformes
Habitat: Brackish & Marine
Scientific name: Periophthalmus waltoni
Name: Hondo Perch
Order: Perciformes
Habitat: Coastal, East Asia
Scientific name: Lateolabrax japonicus
Name: Honey Gourami
Order: Anabantiformes
Habitat: Freshwater, South Asia
Scientific name: Trichogaster chuna
Name: Honeycomb Cardinalfish
Order: Perciformes
Habitat: Marine
Scientific name: Sphaeramia nematoptera
Name: Honeycomb Coral Grouper
Order: Perciformes
Habitat: Marine (Indo-Pacific)
Scientific name: Epinephelus merra
Name: Honeycomb Cowfish
Order: Tetraodontiformes
Habitat: Marine
Scientific name: Acanthostracion polygonius
Name: Honeycomb Eel
Order: Anguilliformes
Habitat: Marine
Scientific name: Gymnothorax favagineus
Name: Honeycomb Grouper
Order: Perciformes
Habitat: Coral reefs, Indo-Pacific
Scientific name: Epinephelus merra
Name: Honeycomb Moray
Order: Anguilliformes
Habitat: Coral reefs, Indo-Pacific
Scientific name: Gymnothorax favagineus
Name: Honeycomb Stingray
Order: Myliobatiformes
Habitat: Coastal, Indo-Pacific
Scientific name: Himantura uarnak
Name: Hook-jawed Eel
Order: Anguilliformes
Habitat: Deep-sea, Atlantic
Scientific name: Nettastoma melanura
Name: Hookear Scavenger
Order: Perciformes
Habitat: Coral reefs, Indo-Pacific
Scientific name: Lethrinus miniatus
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Name: Hookfin Angler (Deep-sea)
Order: Lophiiformes
Habitat: Marine (Deep-sea)
Scientific name: Melanocetus johnsonii
Name: Hookjaw Moray
Order: Anguilliformes
Habitat: Marine
Scientific name: Enchelycore anatina
Name: Hooknose Gurnard
Order: Perciformes
Habitat: Coastal marine
Scientific name: Paratrigla vanessa
Name: Hope's Cod
Order: Gadiformes
Habitat: Cold temperate, North Atlantic
Scientific name: Gadus morhua
Name: Hopkins' Flounder
Order: Pleuronectiformes
Habitat: Coastal, eastern Pacific
Scientific name: Pleuronichthys ritteri
Name: Hoplarchus
Order: Cichliformes
Habitat: Freshwater, South America
Scientific name: Hoplarchus psittacus
Name: Hopliancistrus
Order: Siluriformes
Habitat: South American freshwaters
Scientific name: Hopliancistrus tricomis
Name: Hoplias
Order: Characiformes
Habitat: Central and South American freshwaters
Scientific name: Hoplias malabaricus
Name: Hoplocephalus
Order: Elapidae
Habitat: Terrestrial (Australia)
Scientific name: Hoplocephalus bungei
Name: Hoplocoryphis
Order: Perciformes
Habitat: Deep-water, Indo-Pacific
Scientific name: Hoplocoryphis brachyrhynchus
Name: Hoplognathus
Order: Perciformes
Habitat: Coastal, rocky reefs, western Pacific
Scientific name: Hoplognathus punctatus
Name: Hoplolatilus
Order: Perciformes
Habitat: Rubbly bottoms, Indo-Pacific
Scientific name: Hoplolatilus purpureus
Name: Hoplopagrus
Order: Perciformes
Habitat: Marine (Eastern Pacific)
Scientific name: Hoplopagrus guentherii
Name: Hoplopteryx
Order: Tetraodontiformes
Habitat: Extinct (Cretaceous)
Scientific name: Hoplopteryx fischeri
Name: Hoplosternum
Order: Siluriformes
Habitat: South American freshwaters
Scientific name: Hoplosternum thoracatum
Name: Hoplostethus
Order: Beryciformes
Habitat: Deep-sea, cosmopolitan
Scientific name: Hoplostethus atlanticus
Name: Hoplunnis
Order: Synbranchiformes
Habitat: Freshwater, South America
Scientific name: Hoplunnis tenuis
Name: Horabagrus
Order: Siluriformes
Habitat: Freshwater
Scientific name: Horabagrus
Name: Horadore
Order: Perciformes
Habitat: Freshwater (South America)
Scientific name: Horadore tucumanus
Name: Horn Shark
Order: Heterodontiformes
Habitat: Coastal, eastern Pacific
Scientific name: Heterodontus francisci
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Name: Horn Shark (California)
Order: Heterodontiformes
Habitat: Marine
Scientific name: Heterodontus francisci
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Name: Horn Shark (Crested)
Order: Heterodontiformes
Habitat: Marine
Scientific name: Heterodontus galeatus
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Name: Horn Shark (Japanese)
Order: Heterodontiformes
Habitat: Marine
Scientific name: Heterodontus japonicus
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Name: Horn Shark (Mexican)
Order: Heterodontiformes
Habitat: Marine
Scientific name: Heterodontus mexicanus
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Name: Horn Shark (Oman)
Order: Heterodontiformes
Habitat: Marine
Scientific name: Heterodontus omanensis
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Name: Horn Shark (Port Jackson)
Order: Heterodontiformes
Habitat: Marine
Scientific name: Heterodontus portusjacksoni
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Name: Horn Shark (Zebra)
Order: Heterodontiformes
Habitat: Marine
Scientific name: Heterodontus zebra
Name: Horned Batfish
Order: Lophiiformes
Habitat: Deep sea
Scientific name: Malthopsis cornuta
Name: Horned Blenny
Order: Blenniiformes
Habitat: Coastal marine
Scientific name: Parablennius tentacularis
Name: Horned Cardinalfish
Order: Perciformes
Habitat: Coral reefs, Indo-Pacific
Scientific name: Apogon hornedus
Name: Horned Cod
Order: Gadiformes
Habitat: Marine (Atlantic)
Scientific name: Macrourus berglax
Name: Horned Croaker
Order: Perciformes
Habitat: Marine
Scientific name: Ophioscion sciera
Name: Horned Fin Triggerfish
Order: Tetraodontiformes
Habitat: Marine
Scientific name: Balistes vetula
Name: Horned Flathead
Order: Scorpaeniformes
Habitat: Coastal, Indo-Pacific
Scientific name: Platycephalus indicus
Name: Horned Frogfish
Order: Lophiiformes
Habitat: Indo-Pacific coral reefs
Scientific name: Antennarius cucullatus
Name: Horned Gurnard
Order: Scorpaeniformes
Habitat: Marine
Scientific name: Dactyloptena orientalis
Name: Horned Lizardfish
Order: Aulopiformes
Habitat: Coastal marine
Scientific name: Synodus capricornis
Name: Horned Nautilus
Order: Nautilida
Habitat: Marine (Indo-Pacific)
Scientific name: Nautilus pompilius
Name: Horned Pompano
Order: Carangiformes
Habitat: Coastal marine
Scientific name: Alectis ciliaris (juvenile)
Name: Horned Puffer
Order: Tetraodontiformes
Habitat: Marine
Scientific name: Lactoria cornuta
Name: Horned Rockfish
Order: Scorpaeniformes
Habitat: Marine
Scientific name: Sebastes paucispinis
Name: Horned Sculpin
Order: Scorpaeniformes
Habitat: Marine & Freshwater
Scientific name: Myoxocephalus quadricornis
Name: Horned Seahorse
Order: Syngnathiformes
Habitat: Marine
Scientific name: Hippocampus coronatus
Name: Horned Shark
Order: Heterodontiformes
Habitat: Coastal marine
Scientific name: Heterodontus francisci
Name: Horned Stingray
Order: Myliobatiformes
Habitat: Coastal, Indo-Pacific
Scientific name: Himantura fai
Name: Horned Surgeonfish
Order: Acanthuriformes
Habitat: Marine
Scientific name: Naso unicornis
Name: Horned Toadfish
Order: Batrachoidiformes
Habitat: Marine (Caribbean)
Scientific name: Batrachus coheni
Name: Hornet Perch
Order: Scorpaeniformes
Habitat: Marine (Indo-Pacific)
Scientific name: Platycephalus indicus
Name: Hornetfish
Order: Scorpaeniformes
Habitat: Eastern Australia
Scientific name: Notesthes robusta
Name: Hornpapilla
Order: Perciformes
Habitat: Freshwater, Lake Malawi
Scientific name: Melanochromis auratus
Name: Horse Mackerel
Order: Perciformes
Habitat: Pelagic marine
Scientific name: Trachurus trachurus
Name: Horse Mackerel Scad
Order: Perciformes
Habitat: Pelagic, Atlantic
Scientific name: Trachurus trachurus
Name: Horse Piranha
Order: Characiformes
Habitat: South America
Scientific name: Serrasalmus rhombeus
Name: Horse Tang
Order: Acanthuriformes
Habitat: Marine
Scientific name: Acanthurus nigricans
Name: Horse-eye Jack
Order: Carangiformes
Habitat: Coastal, tropical Atlantic
Scientific name: Caranx latus
Name: Horsefish
Order: Perciformes
Habitat: Coastal marine
Scientific name: Congiopodus spinifer
Name: Horsehead Seahorse
Order: Syngnathiformes
Habitat: Marine (Atlantic)
Scientific name: Hippocampus reidi
Name: Horseshoe Batfish
Order: Ephippiformes
Habitat: Marine
Scientific name: Platax boersii
Name: Horseshoe Crab
Order: Xiphosura
Habitat: Marine (Atlantic)
Scientific name: Limulus polyphemus
Name: Horseshoe Leatherjacket
Order: Tetraodontiformes
Habitat: Marine
Scientific name: Meuschenia hippocrepis
Name: Hosmer's Perch
Order: Perciformes
Habitat: Freshwater (Extinct)
Scientific name: Perca hosmeri
Name: Hotlips Goby
Order: Gobiiformes
Habitat: Mediterranean Sea
Scientific name: Didogobius splechtnai
Name: Hottentot
Order: Perciformes
Habitat: Coastal waters off South Africa
Scientific name: Pachymetopon blochii
Name: Hottentot Seabream
Order: Perciformes
Habitat: Coastal, southern Africa
Scientific name: Pachymetopon blochii
Name: Houbara
Order: Perciformes
Habitat: Marine
Scientific name: Oxycirrhites typus
Name: Houndfish
Order: Beloniformes
Habitat: Tropical and subtropical waters worldwide
Scientific name: Tylosurus crocodilus
Name: Houndfish Needlenose Gar
Order: Beloniformes
Habitat: Coastal, tropical
Scientific name: Tylosurus crocodilus
Name: Houndshark
Order: Carcharhiniformes
Habitat: Temperate waters worldwide
Scientific name: Galeorhinus galeus
Name: House Goby
Order: Gobiiformes
Habitat: Coastal, Indo-Pacific
Scientific name: Bathygobius kokleprisis
Name: Houting
Order: Osmeriformes
Habitat: Freshwater and brackish waters of Eurasia (extinct in some areas)
Scientific name: Coregonus oxyrinchus
Name: Hovercraft
Order: Gobiiformes
Habitat: Marine/Brackish (Indo-Pacific)
Scientific name: Oligolepis acutipennis
Name: Hovercraft Lizardfish
Order: Aulopiformes
Habitat: Sandy bottoms, Indo-Pacific
Scientific name: Synodus hoshinonis
Name: Howella
Order: Perciformes
Habitat: Deep-sea pelagic
Scientific name: Howella brodiei
Name: Huachinango
Order: Perciformes
Habitat: Coastal, western Atlantic
Scientific name: Lutjanus campechanus
Name: Hubbs' Anchovy
Order: Clupeiformes
Habitat: Coastal, western Atlantic
Scientific name: Anchoa hubbsi
Name: Hubbs' Pipefish
Order: Syngnathiformes
Habitat: Coastal, western Atlantic
Scientific name: Syngnathus hubbsi
Name: Huchen
Order: Salmoniformes
Habitat: Freshwater, Europe
Scientific name: Hucho hucho
Name: Hucho
Order: Salmoniformes
Habitat: Freshwaters of Europe and Asia
Scientific name: Hucho hucho
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Name: Hucho (Sakhalin)
Order: Salmoniformes
Habitat: Freshwater
Scientific name: Hucho perryi
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Name: Hucho (Siberian)
Order: Salmoniformes
Habitat: Freshwater
Scientific name: Hucho taimen
Name: Hucho hucho
Order: Salmoniformes
Habitat: Freshwater
Scientific name: Hucho hucho
Name: Hucho ishikawai
Order: Salmoniformes
Habitat: Freshwater
Scientific name: Hucho ishikawai
Name: Hucho taimen
Order: Salmoniformes
Habitat: Freshwater
Scientific name: Hucho taimen
Name: Huchonema
Order: Myxiniformes
Habitat: Marine (Extinct jawless fish)
Scientific name: Huchonema
Name: Humbug Damselfish
Order: Pomacentridae
Habitat: Indo-Pacific coral reefs
Scientific name: Dascyllus aruanus
Name: Humbug Dascyllus
Order: Perciformes
Habitat: Coral reefs, Indo-Pacific
Scientific name: Dascyllus aruanus
Name: Humbug Perchlet
Order: Perciformes
Habitat: Freshwaters of Australia
Scientific name: Ambassis agassizii
Name: Hummingbird Filefish
Order: Tetraodontiformes
Habitat: Coral reefs, Indo-Pacific
Scientific name: Pseudalutarius nasicornis
Name: Hummingbird Fish
Order: Perciformes
Habitat: Deep-sea soles
Scientific name: Symphurus chabanaudi
Name: Hummingbird Goby
Order: Gobiiformes
Habitat: Marine
Scientific name: Stonogobiops nematodes
Name: Humpback Anglerfish
Order: Lophiiformes
Habitat: Deep waters worldwide
Scientific name: Melanocetus johnsonii
Name: Humpback Anthias
Order: Perciformes
Habitat: Deep-water, Indo-Pacific
Scientific name: Odontanthias fuscipinnis
Name: Humpback Ceratioid
Order: Lophiiformes
Habitat: Marine (Deep-sea)
Scientific name: Melanocetus johnsonii
Name: Humpback Cod
Order: Gadiformes
Habitat: Tropical marine waters
Scientific name: Bregmaceros macclellandii
Name: Humpback Flounder
Order: Pleuronectiformes
Habitat: Marine
Scientific name: Psettodes erumei
Name: Humpback Grouper
Order: Perciformes
Habitat: Coral reefs of the Indo-Pacific
Scientific name: Cromileptes altivelis
Name: Humpback Hakes
Order: Gadiformes
Habitat: Marine
Scientific name: Macruronus novaezelandiae
Name: Humpback Hogfish
Order: Perciformes
Habitat: Coral reefs, Indo-Pacific
Scientific name: Bodianus axillaris
Name: Humpback Mahseer
Order: Cypriniformes
Habitat: Freshwater
Scientific name: Tor remadevii
Name: Humpback Puffer
Order: Tetraodontiformes
Habitat: Coastal, Indo-Pacific
Scientific name: Tetrosomus gibbosus
Name: Humpback Red Snapper
Order: Perciformes
Habitat: Marine (Indo-Pacific)
Scientific name: Lutjanus gibbus
Name: Humpback Scorpionfish
Order: Scorpaeniformes
Habitat: Marine
Scientific name: Scorpaenopsis gibbosa
Name: Humpback Snapper
Order: Perciformes
Habitat: Coral reefs and rocky areas of the Indo-Pacific
Scientific name: Lutjanus gibbus
Name: Humpback Unicornfish
Order: Acanthuriformes
Habitat: Coral reefs, Indo-Pacific
Scientific name: Naso brachycentron
Name: Humpbacked Coralfish
Order: Perciformes
Habitat: Marine
Scientific name: Chaetodon nippon
Name: Humpbacked Grouper
Order: Perciformes
Habitat: Marine
Scientific name: Epinephelus lanceolatus
Name: Humphead Bannerfish
Order: Perciformes
Habitat: Marine
Scientific name: Heniochus varius
Name: Humphead Maori Wrasse
Order: Labriformes
Habitat: Marine
Scientific name: Cheilinus undulatus
Name: Humphead Snapper
Order: Lutjaniformes
Habitat: Indo-Pacific coral reefs
Scientific name: Lutjanus gibbus
Name: Humphead Whiptail
Order: Perciformes
Habitat: Coral reefs, Indo-Pacific
Scientific name: Pentapodus bifasciatus
Name: Humphead Wrasse
Order: Perciformes
Habitat: Coral reefs of the Indo-Pacific
Scientific name: Cheilinus undulatus
Name: Humpheaded Glassfish
Order: Perciformes
Habitat: Freshwater, South Asia
Scientific name: Parambassis lala
Name: Humphrey's Cardinalfish
Order: Perciformes
Habitat: Coral reefs, Indo-Pacific
Scientific name: Apogon humphreyi
Name: Humphrey's Pipefish
Order: Syngnathiformes
Habitat: Marine
Scientific name: Corythoichthys ocellatus
Name: Humpty Dumpty
Order: Lophiiformes
Habitat: Coral reefs, Indo-Pacific
Scientific name: Antennarius commerson
Name: Humpy
Order: Salmoniformes
Habitat: Marine & Freshwater
Scientific name: Oncorhynchus gorbuscha
Name: Humpy Blenny
Order: Perciformes
Habitat: Marine
Scientific name: Acanthemblemaria crockeri
Name: Humuhumunukunukuapua'a
Order: Tetraodontiformes
Habitat: Indo-Pacific
Scientific name: Rhinecanthus rectangulus
Name: Hunter River Silver Biddy
Order: Perciformes
Habitat: Marine & Brackish
Scientific name: Gerres equulus
Name: Hunter's Flounder
Order: Pleuronectiformes
Habitat: Marine (Indo-Pacific)
Scientific name: Pseudorhombus arsius
Name: Huntsmanfish
Order: Perciformes
Habitat: Pelagic, host-associated
Scientific name: Echeneis naucrates
Name: Huso dauricus
Order: Acipenseriformes
Habitat: Freshwater & Brackish
Scientific name: Huso dauricus
Name: Huso huso
Order: Acipenseriformes
Habitat: Freshwater & Brackish
Scientific name: Huso huso
Name: Hussar
Order: Perciformes
Habitat: Western Pacific Ocean
Scientific name: Lutjanus adetti
Name: Hussar Snapper
Order: Perciformes
Habitat: Marine
Scientific name: Lutjanus adetti
Name: Hyacinth Goby
Order: Gobiiformes
Habitat: Coral reefs, Indo-Pacific
Scientific name: Stonogobiops yasha
Name: Hydiantherium
Order: Scombriformes
Habitat: Marine (deep sea)
Scientific name: Ruvettus pretiosus
Name: Hydra
Order: Syngnathiformes
Habitat: Temperate waters of Southern Australia
Scientific name: Hypselognathus horridus
Name: Hydrargos
Order: Cypriniformes
Habitat: Freshwaters of China
Scientific name: Hydrargos hoggii
Name: Hydrargyrum
Order: Element
Habitat: Not a fish (Mercury – correction for potential misidentification)
Scientific name: Hg
Name: Hydrocynus
Order: Characiformes
Habitat: Freshwater, Africa
Scientific name: Hydrocynus vittatus
Name: Hydrocynus Vittatus
Order: Characiformes
Habitat: Freshwater (Africa)
Scientific name: Hydrocynus vittatus
Name: Hydrocynus brevis
Order: Characiformes
Habitat: Freshwater
Scientific name: Hydrocynus brevis
Name: Hydrocynus goliath
Order: Characiformes
Habitat: Freshwater
Scientific name: Hydrocynus goliath
Name: Hydrocynus vittatus
Order: Characiformes
Habitat: Freshwater
Scientific name: Hydrocynus vittatus
Name: Hydrolagus
Order: Chimaeriformes
Habitat: North Pacific deep waters
Scientific name: Hydrolagus colliei
Name: Hydrolycus
Order: Characiformes
Habitat: South American freshwaters
Scientific name: Hydrolycus scomberoides
Name: Hydrolycus scomberoides
Order: Characiformes
Habitat: Freshwater
Scientific name: Hydrolycus scomberoides
Name: Hydrolycus tatauaia
Order: Characiformes
Habitat: Freshwater
Scientific name: Hydrolycus tatauaia
Name: Hygophum
Order: Myctophiformes
Habitat: Deep-sea pelagic
Scientific name: Hygophum hygomii
Name: Hymenocephalus
Order: Gadiformes
Habitat: Deep-sea Atlantic and Mediterranean
Scientific name: Hymenocephalus italicus
Name: Hynnodus
Order: Aulopiformes
Habitat: Deep-sea, Indo-Pacific
Scientific name: Hynnodus rorida
Name: Hypamesus
Order: Osmeriformes
Habitat: Marine
Scientific name: Hypamesus
Name: Hypancistrus
Order: Siluriformes
Habitat: Freshwater, South America
Scientific name: Hypancistrus zebra
Name: Hypentelium
Order: Cypriniformes
Habitat: Freshwaters of North America
Scientific name: Hypentelium nigricans
Name: Hyperoglyphe
Order: Perciformes
Habitat: Marine
Scientific name: Hyperoglyphe
Name: Hyperoplus
Order: Perciformes
Habitat: North Atlantic and Baltic Sea
Scientific name: Hyperoplus lanceolatus
Name: Hyphessobrycon
Order: Characiformes
Habitat: Freshwater, South America
Scientific name: Hyphessobrycon eques
Name: Hyphessobrycon amandae
Order: Characiformes
Habitat: Freshwater
Scientific name: Hyphessobrycon amandae
Name: Hyphessobrycon anisitsi
Order: Characiformes
Habitat: Freshwater
Scientific name: Hyphessobrycon anisitsi
Name: Hyphessobrycon bentosi
Order: Characiformes
Habitat: Freshwater
Scientific name: Hyphessobrycon bentosi
Name: Hyphessobrycon callistus
Order: Characiformes
Habitat: Freshwater
Scientific name: Hyphessobrycon callistus
Name: Hyphessobrycon eques
Order: Characiformes
Habitat: Freshwater
Scientific name: Hyphessobrycon eques
Name: Hyphessobrycon erythrostigma
Order: Characiformes
Habitat: Freshwater
Scientific name: Hyphessobrycon erythrostigma
Name: Hyphessobrycon herbertaxelrodi
Order: Characiformes
Habitat: Freshwater
Scientific name: Hyphessobrycon herbertaxelrodi
Name: Hyphessobrycon innesi
Order: Characiformes
Habitat: Freshwater
Scientific name: Hyphessobrycon innesi
Name: Hyphessobrycon loretoensis
Order: Characiformes
Habitat: Freshwater
Scientific name: Hyphessobrycon loretoensis
Name: Hyphessobrycon luederwaldti
Order: Characiformes
Habitat: Freshwater
Scientific name: Hyphessobrycon luederwaldti
Name: Hyphessobrycon megalopterus
Order: Characiformes
Habitat: Freshwater
Scientific name: Hyphessobrycon megalopterus
Name: Hyphessobrycon minor
Order: Characiformes
Habitat: Freshwater
Scientific name: Hyphessobrycon minor
Name: Hyphessobrycon pulchripinnis
Order: Characiformes
Habitat: Freshwater
Scientific name: Hyphessobrycon pulchripinnis
Name: Hyphessobrycon pyrrhonotus
Order: Characiformes
Habitat: Freshwater (South America)
Scientific name: Hyphessobrycon pyrrhonotus
Name: Hyphessobrycon rosaceus
Order: Characiformes
Habitat: Freshwater
Scientific name: Hyphessobrycon rosaceus
Name: Hyphessobrycon sweglesi
Order: Characiformes
Habitat: Freshwater
Scientific name: Hyphessobrycon sweglesi
Name: Hypleurochilus
Order: Perciformes
Habitat: Marine
Scientific name: Hypleurochilus
Name: Hypnos
Order: Torpediniformes
Habitat: Coastal, Australia
Scientific name: Hypnos monopterygius
Name: Hypoatherina
Order: Atheriniformes
Habitat: Coastal, Indo-Pacific
Scientific name: Hypoatherina valenciennei
Name: Hypogaleus
Order: Carcharhiniformes
Habitat: Deep-water, Western Pacific
Scientific name: Hypogaleus hyugaensis
Name: Hypomesus
Order: Osmeriformes
Habitat: Coastal, North Pacific
Scientific name: Hypomesus pretiosus
Name: Hypophthalmichthys
Order: Cypriniformes
Habitat: Freshwater
Scientific name: Hypophthalmichthys
Name: Hypophthalmichthys molitrix
Order: Cypriniformes
Habitat: Freshwater
Scientific name: Hypophthalmichthys molitrix
Name: Hypophthalmichthys nobilis
Order: Cypriniformes
Habitat: Freshwater
Scientific name: Hypophthalmichthys nobilis
Name: Hypopion
Order: Siluriformes
Habitat: Freshwater (Extinct)
Scientific name: Hypopion
Name: Hypoplectrus
Order: Perciformes
Habitat: Coral reefs, western Atlantic
Scientific name: Hypoplectrus unicolor
Name: Hypoplectrus gemma
Order: Perciformes
Habitat: Marine
Scientific name: Hypoplectrus gemma
Name: Hypoplectrus indigo
Order: Perciformes
Habitat: Marine
Scientific name: Hypoplectrus indigo
Name: Hypoplectrus unicolor
Order: Perciformes
Habitat: Marine
Scientific name: Hypoplectrus unicolor
Name: Hypopomus
Order: Gymnotiformes
Habitat: Freshwater, South America
Scientific name: Hypopomus artedi
Name: Hypoptopoma
Order: Siluriformes
Habitat: Freshwater, South America
Scientific name: Hypoptopoma thoracatum
Name: Hypoptychus
Order: Perciformes
Habitat: North Pacific Ocean
Scientific name: Hypoptychus dybowskii
Name: Hyporamphus
Order: Beloniformes
Habitat: Coastal, Indo-Pacific
Scientific name: Hyporamphus quoyi
Name: Hyporhamphus
Order: Beloniformes
Habitat: Tropical and subtropical marine waters
Scientific name: Hyporhamphus unifasciatus
Name: Hyposalarius
Order: Perciformes
Habitat: Marine
Scientific name: Hyposalarius
Name: Hypostomus
Order: Siluriformes
Habitat: South American freshwaters
Scientific name: Hypostomus plecostomus
Name: Hypostomus cochliodon
Order: Siluriformes
Habitat: Freshwater (South America)
Scientific name: Hypostomus cochliodon
Name: Hypostomus punctatus
Order: Siluriformes
Habitat: South American freshwaters
Scientific name: Hypostomus punctatus
Name: Hyposygnathus
Order: Syngnathiformes
Habitat: Indo-Pacific marine
Scientific name: Hyposygnathus draco
Name: Hypseleotris
Order: Gobiiformes
Habitat: Freshwater
Scientific name: Hypseleotris
Name: Hypseleotris compressa
Order: Gobiiformes
Habitat: Freshwater
Scientific name: Hypseleotris compressa
Name: Hypselobarbus
Order: Cypriniformes
Habitat: Freshwater, India
Scientific name: Hypselobarbus curmuca
Name: Hypsiopomus
Order: Perciformes
Habitat: Marine
Scientific name: Hypsiopomus sp.
Name: Hypsipops rubicundus
Order: Perciformes
Habitat: Marine
Scientific name: Hypsipops rubicundus
Name: Hypsistius
Order: Perciformes
Habitat: Marine
Scientific name: Hypsistius
Name: Hypsoblennius
Order: Blenniiformes
Habitat: Western Atlantic
Scientific name: Hypsoblennius hentz
Name: Hypsolebias
Order: Cyprinodontiformes
Habitat: Freshwater
Scientific name: Hypsolebias
Name: Hypsolebias flammeus
Order: Cyprinodontiformes
Habitat: Freshwater
Scientific name: Hypsolebias flammeus
Name: Hypsolebias magnificus
Order: Cyprinodontiformes
Habitat: Freshwater
Scientific name: Hypsolebias magnificus
Name: Hypsolebias tocantinensis
Order: Cyprinodontiformes
Habitat: Freshwater
Scientific name: Hypsolebias tocantinensis
Name: Hypsoperus
Order: Perciformes
Habitat: Marine
Scientific name: Hypsoperus sp.
Name: Hypsophrys
Order: Cichliformes
Habitat: Freshwaters of Central America
Scientific name: Hypsophrys nicaraguensis
Name: Hypsophrys nicaraguensis
Order: Cichliformes
Habitat: Freshwaters of Central America
Scientific name: Hypsophrys nicaraguensis
Name: Hypsurus
Order: Perciformes
Habitat: Marine
Scientific name: Hypsurus caryi
Name: Hypsurus caryi
Order: Perciformes
Habitat: Marine (Pacific)
Scientific name: Hypsurus caryi
Name: Hypsypops
Order: Perciformes
Habitat: Coastal, eastern Pacific
Scientific name: Hypsypops rubicundus
Name: Hypsypops rubicundus
Order: Perciformes
Habitat: Marine
Scientific name: Hypsypops rubicundus
| Name | Order | Habitat | Scientific name |
|---|---|---|---|
| Haddock | Gadiformes | North Atlantic Ocean | Melanogrammus aeglefinus |
| Hadrosaurus | Characiformes | Freshwater (South America) | Mylossoma duriventre |
| Haemulon | Perciformes | Western Atlantic coral reefs | Haemulon album |
| Hagfish | Myxiniformes | Deep temperate and tropical waters worldwide | Myxine glutinosa |
| Hairfin Anchovy | Clupeiformes | Marine | Setipinna tenuifilis |
| Hairfin Anthias | Perciformes | Coral reefs, Indo-Pacific | Anthias lee |
| Hairfin Snapper | Perciformes | Coral reefs, Indo-Pacific | Lutjanus erythropterus |
| Hairstreak Blenny | Blenniiformes | Coastal marine | Omobranchus halei |
| Hairtail | Perciformes | Tropical and temperate waters worldwide | Trichiurus lepturus |
| Hairtail Blenny | Perciformes | Coral reefs, Indo-Pacific | Xiphasia setifer |
| Hairy Angler | Lophiiformes | Deep-sea, mesopelagic to bathypelagic | Caulophryne jordani |
| Hairy Blenny | Blenniiformes | Coastal marine | Labrisomus nuchipinnis |
| Hairy Frogfish | Lophiiformes | Coral reefs, tropical and subtropical waters | Antennarius striatus |
| Hairy Mussel Blenny | Perciformes | Coastal, rocky shores, western Atlantic | Hypleurochilus arizonae |
| Hairy Sea Horse | Syngnathiformes | Coral reefs, cryptic, Indo-Pacific | Hippocampus bargibanti |
| Hairychin Flounder | Pleuronectiformes | Marine (Indo-Pacific) | Samaris cristatus |
| Hairyfish | Aulopiformes | Deep-sea, mesopelagic | Scopelarchus analis |
| Hakavale | Perciformes | Coastal, rocky reefs, New Zealand | Cheilodactylus spectabilis |
| Hake | Gadiformes | Deep-sea, Atlantic and Pacific | Merlucciidae |
| Hakea Cod | Gadiformes | Deep-sea, temperate Atlantic | Macruronus maderensis |
| Hakeling | Gadiformes | Deep-sea, Atlantic | Laemonema goodebeanorum |
| Hakes | Gadiformes | Marine | Merlucciidae |
| Haku Lei | Aulopiformes | Marine (Indo-Pacific) | Aulopus filamentosus |
| Half-banded Barb | Cypriniformes | Freshwater, flowing water, Southeast Asia | Barbodes semifasciolatus |
| Half-banded Grouper | Perciformes | Coral reefs, Indo-Pacific | Epinephelus fasciatus |
| Half-barred Flasher Wrasse | Perciformes | Coral reefs, Indo-Pacific | Paracheilinus cyaneus |
| Half-barred Wrasse | Perciformes | Coral reefs, Indo-Pacific | Hemigymnus fasciatus |
| Halfband Cardinalfish | Perciformes | Marine (Indo-Pacific) | Apogon semiornatus |
| Halfbeak | Beloniformes | Tropical and subtropical waters worldwide | Hyporhamphus unifasciatus |
| Halfmoon | Perciformes | Coastal, rocky reefs, eastern Pacific | Medialuna californiensis |
| Halfmouth Sleeper | Gobiiformes | Freshwater/Brackish (Indo-Pacific) | Ophiocara porocephala |
| Halfspine Cardinalfish | Perciformes | Coral reefs, Indo-Pacific | Apogon semiorbicularis |
| Halibut | Pleuronectiformes | North Atlantic and Pacific Oceans | Hippoglossus hippoglossus |
| Halibut (Atlantic) | Pleuronectiformes | North Atlantic Ocean | Hippoglossus hippoglossus |
| Halibut (Pacific) | Pleuronectiformes | North Pacific Ocean | Hippoglossus stenolepis |
| Hall's Blenny | Perciformes | Coral reefs, Indo-Pacific | Ecsenius halli |
| Hall's Grunt | Perciformes | Marine | Pomadasys opercularis |
| Hallas' Barbel | Cypriniformes | Freshwaters of Southeast Asia | Barbus hallasi |
| Hallas's Cichlid | Cichliformes | Central America | Thorichthys hallasi |
| Halmahera Cardinalfish | Perciformes | Coral reefs, Indo-Pacific | Apogon margaritophorus |
| Halo Blenny | Blenniiformes | Coral reefs of the Indo-Pacific | Cirripectes auratus |
| Halocynthia aurantium | Stolidobranchia | Benthic Arctic and subarctic waters | Halocynthia aurantium |
| Halong | Cypriniformes | Freshwater (Asia) | Acrossocheilus hemispinus |
| Hamacore | Perciformes | Coral reefs, Indo-Pacific | Lethrinus nebulosus |
| Hamburger Triggerfish | Tetraodontiformes | Coral reefs, Indo-Pacific | Sufflamen bursa |
| Hamerkop | Cichliformes | Freshwater | Haplochromis hamerkop |
| Hamilton's Thryssa | Clupeiformes | Estuaries, coastal, Indo-Pacific | Thryssa hamiltonii |
| Hamlet | Perciformes | Coral reefs, western Atlantic | Hypoplectrus |
| Hammerbarbel | Siluriformes | Estuaries, coastal, Indo-Pacific | Tachysurus thalassinus |
| Hammerhead Shark | Carcharhiniformes | Coastal and offshore warm temperate and tropical waters | Sphyrna mokarran |
| Hammerhead Stickleback | Gasterosteiformes | Marine & Freshwater | Gasterosteus aculeatus |
| Hammock Blenny | Perciformes | Coral reefs, Indo-Pacific | Omobranchus ferox |
| Hampton's Carp | Cypriniformes | Freshwaters of West Africa | Labeo hamtoni |
| Hapalogenys | Perciformes | Coastal, rocky reefs, western Pacific | Hapalogenys mucronatus |
| Haplochromis | Cichliformes | African Great Lakes | Haplochromis sp. |
| Hapuku | Perciformes | Marine | Polyprion oxygeneios |
| Hardhead Catfish | Siluriformes | Coastal and and brackish waters of the Western Atlantic | Ariopsis felis |
| Hardhead Catfish (Atlantic) | Siluriformes | Marine & Brackish | Ariopsis felis |
| Hardhead Sea Catfish | Siluriformes | Marine/Brackish (Western Atlantic) | Ariopsis felis |
| Hardhead Silverside | Atheriniformes | Coastal waters of the Atlantic Ocean | Atherinomorus lacunosus |
| Hardnose Shark | Carcharhiniformes | Coastal, tropical, Indo-Pacific | Carcharhinus macloti |
| Hardtail Scad | Carangiformes | Pelagic marine | Megalaspis cordyla |
| Hardyhead Silverside | Atheriniformes | Indo-Pacific | Atherinomorus lacunosus |
| Harelip Barb | Cypriniformes | Freshwater, rivers, Southeast Asia | Osteochilus vittatus |
| Harelip Blenny | Blenniiformes | Western Atlantic coral reefs | Ophioblennius atlanticus |
| Harelip Sucker | Cypriniformes | Formerly Ohio and Mississippi River Basins (extinct) | Lagochila lacera |
| Harlequin Bass | Perciformes | Coral reefs, western Atlantic | Serranus tigrinus |
| Harlequin Filefish | Tetraodontiformes | Coral reefs of the Indo-Pacific | Oxymonacanthus longirostris |
| Harlequin Grouper | Perciformes | Coral reefs, Indo-Pacific | Cephalopholis polleni |
| Harlequin Hind | Perciformes | Coral reefs, Indo-Pacific | Cephalopholis argus |
| Harlequin Sand Perch | Perciformes | Coastal, sandy bottoms, western Atlantic | Diplectrum formosum |
| Harlequin Shark | Carcharhiniformes | Coastal marine | Carcharhinus signatus (regional name) |
| Harlequin Shrimpfish | Syngnathiformes | Coral reefs, seagrass beds, Indo-Pacific | Aeoliscus strigatus |
| Harlequin Sweetlips | Perciformes | Coral reefs of the Indo-Pacific | Plectorhinchus chaetodonoides |
| Harp Sucker | Cypriniformes | Freshwater, western North America | Acrocheilus alutaceus |
| Harpadon | Aulopiformes | Coastal, estuaries, Indo-Pacific | Harpadon nehereus |
| Harpago | Perciformes | Deep waters of the Indo-Pacific | Harpago longirostris |
| Harpoon Eel | Anguilliformes | Indo-Pacific coral reefs and seagrass beds | Moringua ferruginea |
| Harpoon Seabass | Perciformes | Marine | Centropomus undecimalis |
| Harpooner | Perciformes | Coastal marine | Anisotremus interruptus |
| Harrington's Goby | Perciformes | Marine | Bathygobius soporator |
| Harris Mudskipper | Perciformes | Brackish | Periophthalmus modestus |
| Harrowed Sole | Pleuronectiformes | Marine | Atheresthes stomias |
| Harry's Blenny | Perciformes | Coral reefs, Indo-Pacific | Ecsenius collettei |
| Hart's Rivulus | Cyprinodontiformes | Freshwater, streams, Trinidad and Tobago | Rivulus hartii |
| Harvest Butterfish | Perciformes | Coastal marine | Peprilus triacanthus |
| Harvester Sucker | Cypriniformes | Freshwater, rivers, central North America | Moxostoma congestum |
| Harvestfish | Perciformes | Coastal marine | Peprilus alepidotus |
| Hatchet Molly | Cyprinodontiformes | Freshwater, brackish, Central America | Poecilia sphenops |
| Hatchetfish | Stomiiformes | Deep mesopelagic and bathypelagic waters worldwide | Argyropelecus hemigymnus |
| Hatchfish | Stomiiformes | Deep ocean waters | Sternoptychidae |
| Haustellum | Perciformes | Marine (Indo-Pacific) | Haustellum scorpio |
| Hawaii Damselfish | Perciformes | Marine | Abudefduf abdominalis |
| Hawaiian Barred Knifejaw | Perciformes | Coastal, rocky reefs, Hawaii | Oplegnathus fasciatus |
| Hawaiian Bigeye | Priacanthiformes | Reefs, Hawaii | Priacanthus meeki |
| Hawaiian Black Marlin | Istiophoriformes | Pelagic, tropical Indo-Pacific | Makaira mazara |
| Hawaiian Conger | Anguilliformes | Coastal marine | Conger marginatus |
| Hawaiian Dascyllus | Perciformes | Coral reefs, Hawaii | Dascyllus albisella |
| Hawaiian Dragon Moray | Anguilliformes | Coral reefs, Hawaii | Enchelycore pardalis |
| Hawaiian Flagtail | Perciformes | Coastal, Hawaii | Kuhlia sandvicensis |
| Hawaiian Flounder | Pleuronectiformes | Coastal marine | Engyprosopon hawaiiensis |
| Hawaiian Flyingfish | Beloniformes | Pelagic, Hawaii | Cheilopogon atrisignis |
| Hawaiian Goldfish | Perciformes | Marine (Pacific) | Pristipomoides auricilla |
| Hawaiian Green Lionfish | Scorpaeniformes | Hawaii" | Pterois sp."Coral reefs |
| Hawaiian Gregory | Perciformes | Coral reefs, Hawaii | Stegastes marginatus |
| Hawaiian Hogfish | Perciformes | Reefs, Hawaii | Bodianus albotaeniatus |
| Hawaiian Ladyfish | Elopiformes | Coastal, estuaries, Hawaii | Elops hawaiiensis |
| Hawaiian Lizardfish | Aulopiformes | Coastal marine | Synodus ulae |
| Hawaiian Monkfish | Lophiiformes | Marine (Pacific) | Lophius setigerus |
| Hawaiian Moray | Anguilliformes | Coral reefs, Hawaii | Gymnothorax meleagris |
| Hawaiian Mullet | Mugiliformes | Coastal, estuaries, Hawaii | Mugil cephalus |
| Hawaiian Peppered Moray | Anguilliformes | Coral reefs, Hawaii | Gymnothorax picta |
| Hawaiian Searobin | Perciformes | Coastal marine | Pterygotrigla picta |
| Hawaiian Sergeant | Perciformes | Tropical reefs of the Hawaiian Islands | Abudefduf abdominalis |
| Hawaiian Sergeant Major | Perciformes | Coral reefs, Hawaii | Abudefduf abdominalis |
| Hawaiian Slingjaw Wrasse | Perciformes | Coral reefs, Hawaii | Epibulus insidiator |
| Hawaiian Snake Eel | Anguilliformes | Sandy bottoms, Hawaii | Ophichthus uropunctatus |
| Hawaiian Squirrelfish | Holocentriformes | Coral reefs, Hawaii | Sargocentron xantherythrum |
| Hawaiian Swordfish | Istiophoriformes | Pelagic, Hawaii | Xiphias gladius |
| Hawaiian Tilefish | Perciformes | Sandy bottoms, Hawaii | Malacanthus hoedtii |
| Hawaiian Trumpetfish | Syngnathiformes | Coral reefs, Hawaii | Aulostomus chinensis |
| Hawaiian Warriorfish | Perciformes | Coral reefs, Hawaii | Acanthurus nigricans |
| Hawkfish | Perciformes | Coral reefs of the Indo-Pacific | Cirrhitichthys falco |
| Hawkfish Blenny | Perciformes | Coral reefs, Indo-Pacific | Cirripectes castaneus |
| Hawksbill Sea Turtle | Testudines | Marine (tropical/subtropical oceans) | Eretmochelys imbricata |
| Hawksbill Triggerfish | Tetraodontiformes | Marine | Sufflamen bursa |
| Hazel Blenny | Perciformes | Coastal, rocky shores, Mediterranean | Parablennius gattorugine |
| Head-barred Sandperch | Perciformes | Sandy bottoms, Indo-Pacific | Parapercis clathrata |
| Headed Gourami | Anabantiformes | Freshwaters of Southeast Asia | Osphronemus gouramy |
| Headlight Anglerfish | Lophiiformes | Marine (deep sea) | Linophryne lucifer |
| Headsail Orcafish | Lampriformes | Deep-sea, mesopelagic | Stylephorus chordatus |
| Headshield Catfish | Siluriformes | Freshwater, South America | Cephalius macrurus |
| Headstander | Characiformes | Freshwater rivers of South America | Anostomus anostomus |
| Heard Island Icefish | Perciformes | Marine | Channichthys rhinoceratus |
| Heater | Perciformes | Coastal waters of the western Atlantic Ocean | Cynoscion regalis |
| Heavenly Emperor | Perciformes | Marine | Symphysanodon typus |
| Heavily-barred Sandperch | Perciformes | Sandy bottoms, Indo-Pacific | Parapercis tetracantha |
| Heavy-jawed Seabream | Perciformes | Coastal, rocky reefs, eastern Atlantic | Pagellus bogaraveo |
| Heavythread Bream | Perciformes | Sandy bottoms, Indo-Pacific | Nemipterus marginatus |
| Hecht's Cichlid | Cichliformes | Freshwater, Central America | Thorichthys hecko |
| Hecklefish | Perciformes | Western Atlantic and Caribbean coastal | Centropomus undecimalis |
| Hector's Goby | Gobiiformes | Coral reefs, Indo-Pacific | Koumansetta hectori |
| Heel-spot Cardinalfish | Perciformes | Coral reefs, Indo-Pacific | Apogon kallopterus |
| Helco Anglerfish | Lophiiformes | Coral reefs, western Atlantic | Antennarius sanguineus |
| Helecine | Perciformes | Marine (Western Atlantic) | Symphurus plagiusa |
| Helen's Halfbeak | Beloniformes | Western Atlantic shallow waters | Hyporhamphus rolandi |
| Helena Catfish | Siluriformes | South American freshwaters | Helogenes marmoratus |
| Helicolenus | Scorpaeniformes | Marine (Atlantic) | Helicolenus dactylopterus |
| Helicoprion | Eugeneodontiformes | Extinct (Permian) | Helicoprion bessonowi |
| Helmet Gurnard | Perciformes | Tropical Indo-Pacific waters | Dactyloptena orientalis |
| Helmet Perch | Perciformes | Marine | Hoplolatilus fronticinctus |
| Helmet Seabream | Spariformes | Marine | Chrysoblephus laticeps |
| Helmet Triggerfish | Tetraodontiformes | Coral reefs, Indo-Pacific | Balistes galeus |
| Helostoma Gourami | Anabantiformes | Freshwaters of Southeast Asia | Helostoma temminckii |
| Helotes | Perciformes | Coastal, Indo-Pacific | Helotes sexlineatus |
| Hemanthous Scorpionfish | Scorpaeniformes | Marine | Scorpaena hemiptera |
| Hemiancistrus | Siluriformes | South American freshwaters | Hemiancistrus sp. |
| Hemibagrus | Siluriformes | Southeast Asian freshwaters | Hemibagrus nemurus |
| Hemibarbus | Cypriniformes | Freshwater | Hemibarbus |
| Hemibrycon | Characiformes | Freshwater, South America | Hemibrycon gibbosus |
| Hemichromis | Cichliformes | Freshwater, Africa | Hemichromis bimaculatus |
| Hemichromis elongatus | Cichliformes | Freshwater | Hemichromis elongatus |
| Hemidoras | Siluriformes | Freshwater | Hemidoras |
| Hemigrammus | Characiformes | Freshwater, South America | Hemigrammus rhodostomus |
| Hemilepidotus | Scorpaeniformes | Coastal, North Pacific | Hemilepidotus spinosus |
| Hemiodus | Characiformes | Freshwater, South America | Hemiodus quadrimaculatus |
| Hemipimelodus | Siluriformes | Freshwater, New Guinea | Hemipimelodus papuensis |
| Hemiplagia | Lophiiformes | Marine | Hemiplagia |
| Hemiplectrus | Perciformes | Coastal, Indo-Pacific | Hemiplectrus macropterus |
| Hemipteronotus | Perciformes | Marine | Hemipteronotus |
| Hemiramphodon | Beloniformes | Freshwater & Brackish | Hemiramphodon |
| Hemiramphus | Beloniformes | Coastal, Indo-Pacific | Hemiramphus far |
| Hemiscyllium | Orectolobiformes | Coral reefs, Indo-Pacific | Hemiscyllium ocellatum |
| Hemispherical Batfish | Ephippiformes | Marine | Platax orbicularis |
| Hemitaurichthys | Perciformes | Coral reefs, Indo-Pacific | Hemitaurichthys polylepis |
| Hemitilapia | Cichliformes | Lake Malawi | Hemitilapia oxyrhyncha |
| Hemitrygon | Myliobatiformes | Coastal, Western Pacific | Hemitrygon akajei |
| Hemitrygon akajei | Myliobatiformes | Marine | Hemitrygon akajei |
| Hemochromis | Perciformes | Freshwater, Africa | Hemochromis rufiventris |
| Hendecanchus | Acanthuriformes | Deep-water, Indo-Pacific | Hendecanchus schneideri |
| Hendricks' Silverside | Atheriniformes | Marine & Brackish | Menidia beryllina |
| Heng's Rasbora | Cypriniformes | Freshwater | Rasbora hengelo |
| Hengeli Rasbora | Cypriniformes | Freshwater, Southeast Asia | Rasbora hengeli |
| Henshaw's Goby | Gobiiformes | Coastal, rocky shores, Mediterranean | Gobius henshawi |
| Hepatus | Perciformes | Deep-water, Indo-Pacific | Hepatus epinophorus |
| Heptapterus | Siluriformes | Freshwater, South America | Heptapterus mustelinus |
| Heptastichius | Perciformes | Indo-Pacific" | Heptastichius sp."Deep-water |
| Herald Perchlet | Perciformes | Marine/Brackish (Indo-Pacific) | Ambassis vachellii |
| Herbivorous Catfish | Siluriformes | Freshwater | Panaque armbrusteri |
| Herkul's Dragonet | Syngnathiformes | Deep-water, Indo-Pacific | Synchiropus herculaneus |
| Hermatobates | Perciformes | Marine (Indo-Pacific) | Bathygobius fuscus |
| Hermitfish | Perciformes | Coral reefs, Indo-Pacific (general term) | Apogonidae |
| Herring | Clupeiformes | Temperate and subarctic waters of the North Atlantic and Pacific | Clupea harengus |
| Herring (Atlantic) | Clupeiformes | Marine | Clupea harengus |
| Herring (Pacific) | Clupeiformes | Marine | Clupea pallasii |
| Herring Eel | Anguilliformes | Coastal, Atlantic | Conger oceanicus |
| Herring Scad | Carangiformes | Marine | Atule mate |
| Herring Smelt | Osmeriformes | Coastal, North Atlantic and Pacific | Mallotus villosus |
| Herzenstein's Boxfish | Tetraodontiformes | Coral reefs, Indo-Pacific | Ostracion rhinorhynchos |
| Hesperichthys | Cypriniformes | Freshwater | Hesperichthys |
| Heterandria | Cyprinodontiformes | Freshwater, North America | Heterandria formosa |
| Heterenchelys | Anguilliformes | Deep-sea, Indo-Pacific | Heterenchelys longipinna |
| Heterobranchus | Siluriformes | Freshwater, Africa | Heterobranchus longifilis |
| Heterocercal Shark | Carcharhiniformes | Marine | Heterocercal Sharks (various species) |
| Heteroconger | Anguilliformes | Coral reefs, burrowing, Indo-Pacific | Heteroconger hassi |
| Heterodontus | Heterodontiformes | Coastal, eastern Pacific | Heterodontus francisci |
| Heteroeleptris | Gobiiformes | Deep-water, Indo-Pacific | Heteroeleptris vulgaris |
| Heteromycteris | Pleuronectiformes | Coastal, Indo-Pacific | Heteromycteris hartzfeldii |
| Heteropneustes | Siluriformes | Freshwater, South Asia | Heteropneustes fossilis |
| Heteropriacanthus | Perciformes | Coral reefs, tropical | Heteropriacanthus cruentatus |
| Heterosmilodon | Lampriformes | Deep-sea, Indo-Pacific | Heterosmilodon bicornutus |
| Heterotis | Osteoglossiformes | Freshwater | Heterotis niloticus |
| Hexafish | Orectolobiformes | Marine | Brachaelurus waddi |
| Hexagrammos | Hexagrammiformes | North Pacific waters | Hexagrammos decagrammus |
| Hexanchus | Hexanchiformes | Deep-sea, cosmopolitan | Hexanchus griseus |
| Hexanchus griseus | Hexanchiformes | Marine | Hexanchus griseus |
| Hexanchus microperus | Hexanchiformes | Marine | Hexanchus microperus |
| Hexanchus nakamurae | Hexanchiformes | Marine | Hexanchus nakamurae |
| Hexanchus peruanus | Hexanchiformes | Marine | Hexanchus peruanus |
| Hexanchus vitulus | Hexanchiformes | Deep temperate and tropical waters worldwide | Hexanchus vitulus |
| Hexanematichthys | Siluriformes | Marine and brackish waters of the Indo-Pacific | Hexanematichthys leptocanthus |
| Hexapleura | Pleuronectiformes | Deep-water, Indo-Pacific | Hexapleura microtis |
| Hexaprotodon | Loricariiformes | Freshwater (Extinct) | Hexaprotodon |
| Hexatrygon | Myliobatiformes | Deep-sea, Indo-Pacific | Hexatrygon bruuni |
| Hibiscus Triggerfish | Tetraodontiformes | Coral reefs, Indo-Pacific | Sufflamen bursa |
| Hickory Shad | Clupeiformes | Anadromous, eastern North America | Alosa mediocris |
| Hidefisch | Perciformes | Deep-water, Indo-Pacific | Pristigenys serrula |
| High Snout Catfish | Siluriformes | Estuaries, coastal, Indo-Pacific | Otolithoides biauritus |
| High-Heel Catfish | Siluriformes | Freshwater, South America | Pimelodus blochii |
| High-backed Catfish | Siluriformes | Marine & Brackish | Arius dussumieri |
| High-backed Drum | Pempheriformes | Western Atlantic reefs | Pempheris schomburgkii |
| High-finned Grouper | Perciformes | Marine | Mycteroperca bonaci |
| High-finned Loach | Cypriniformes | Freshwater | Botia dario |
| High-finned Pickerel | Esociformes | Freshwater | Esox americanus vermiculatus |
| High-finned Shad | Clupeiformes | Marine & Freshwater | Alosa sapidissima |
| High-finned Skilfish | Scorpaeniformes | Marine | Erilepis zonifer |
| High-finned Sole | Pleuronectiformes | Marine | Psettodes erumei |
| High-hat | Perciformes | Coastal marine | Equetus acuminatus |
| High-yellow Tang | Acanthuriformes | Marine | Zebrasoma flavescens |
| Highback Snapper | Perciformes | Coral reefs, Indo-Pacific | Lutjanus gibbus |
| Highbrow Goby | Gobiiformes | Coral reefs, Indo-Pacific | Gobiodon ceramensis |
| Highfin Amberjack | Perciformes | Pelagic, tropical and temperate | Seriola rivoliana |
| Highfin Basslet | Perciformes | Deep-water, Caribbean | Lipogramma klayi |
| Highfin Blenny | Perciformes | Coastal, rocky shores, Mediterranean | Aidablennius sphynx |
| Highfin Cardinalfish | Perciformes | Coral reefs, Indo-Pacific | Apogon hartzfeldi |
| Highfin Carpsucker | Cypriniformes | Freshwater | Carpiodes velifer |
| Highfin Chimaera | Chimaeriformes | Deep waters worldwide | Harriotta raleighana |
| Highfin Coris | Perciformes | Coral reefs, Indo-Pacific | Coris gaimard |
| Highfin Grouper | Perciformes | Indo-Pacific coral reefs | Epinephelus altivelis |
| Highfin Lizardfish | Aulopiformes | Sandy bottoms, Indo-Pacific | Synodus lacertinus |
| Highfin Loach | Cypriniformes | Freshwaters of Southeast Asia | Botia modesta |
| Highfin Soapfish | Perciformes | Coral reefs, Indo-Pacific | Grammistes sexlineatus |
| Highfin Spadefish | Perciformes | Coastal, western Atlantic | Chaetodipterus faber |
| Highfin Tilefish | Perciformes | Rubbly bottoms, Indo-Pacific | Hoplolatilus starcki |
| Highhat | Perciformes | Tropical Western Atlantic reefs | Equetus acuminatus |
| Highlight Goby | Gobiiformes | Western Atlantic coral reefs | Elacatinus multifasciatus |
| Highwater Maned Blenny | Perciformes | Coastal, rocky shores, Indo-Pacific | Salarias fasciatus |
| Hildebrand's Anchovy | Clupeiformes | Coastal, eastern Pacific | Engraulis mordax |
| Hillstream Loach | Cypriniformes | Fast-flowing freshwaters in Asia | Balitoridae |
| Hilsa | Clupeiformes | Estuaries and coastal waters of the Indo-Pacific | Tenualosa ilisha |
| Hilsa Shad | Clupeiformes | Anadromous, Indo-Pacific | Tenualosa ilisha |
| Himalayan Golden Mahseer | Cypriniformes | Freshwater | Tor putitora |
| Himalayan Pit Viper | Perciformes | Freshwater, Africa (introduced) | Oreochromis niloticus |
| Himantura | Myliobatiformes | Indo-Pacific marine and brackish waters | Himantura uarnak |
| Hind | Perciformes | Coral reefs, tropical and subtropical (general term) | Epinephelus |
| Hingebeak Shrimpfish | Syngnathiformes | Coral reefs, seagrass beds, Indo-Pacific | Aeoliscus strigatus |
| Hippocampus | Syngnathiformes | Seagrass, coral reefs (general term for seahorse) | Hippocampus |
| Hippocampus kuda | Syngnathiformes | Indo-Pacific marine waters | Hippocampus kuda |
| Hippocampus reidi | Syngnathiformes | Western Atlantic marine | Hippocampus reidi |
| Hippoglossina | Pleuronectiformes | Deep-water, eastern Pacific | Hippoglossina stomata |
| Hippoglossoides | Pleuronectiformes | Deep-water, North Atlantic | Hippoglossoides platessoides |
| Hippoglossus | Pleuronectiformes | North Atlantic Ocean | Hippoglossus hippoglossus |
| Hippopede | Perciformes | Freshwater (Africa) | Hippopotamus amphibius |
| Hippopotamus Fish | Mormyriformes | Freshwater, Africa | Mormyrops anguilloides |
| Hipposcarus | Perciformes | Indo-Pacific coral reefs | Hipposcarus longiceps |
| Hiretail Frogfish | Lophiiformes | Coral reefs, Indo-Pacific | Antennarius analis |
| Hirondellea | Zoarciformes | Deep-sea, abyssal | Hirondellea gigas |
| Histiophryne | Lophiiformes | Marine (Indo-Pacific) | Histiophryne psychedelica |
| Histiopterus | Perciformes | Indo-Pacific marine | Histiopterus typus |
| Histrio histrio | Lophiiformes | Sargassum weed in tropical and subtropical waters worldwide | Histrio histrio |
| Hoary Batfish | Tetraodontiformes | Coastal, Indo-Pacific | Platax boersii |
| Hobbs' Anchovy | Engraulidae | Eastern Pacific Ocean | Anchoa hobbsi |
| Hog Choker | Pleuronectiformes | Marine & Freshwater | Trinectes maculatus |
| Hog Mackerel | Perciformes | Pelagic marine | Decapterus macarellus |
| Hogchoker | Pleuronectiformes | Western Atlantic and Caribbean coastal waters | Trinectes maculatus |
| Hogfish | Perciformes | Reefs and rocky bottoms of the Western Atlantic | Lachnolaimus maximus |
| Hogfish (Cuban) | Labriformes | Marine | Bodianus rufus |
| Hogfish (Spanish) | Labriformes | Marine | Bodianus scrofa |
| Hogfish (Yellow) | Labriformes | Marine | Bodianus sagittarius |
| Hogfish Snapper | Perciformes | Coral reefs, Indo-Pacific | Lethrinus miniatus |
| Hogun Blenny | Perciformes | Coastal, rocky shores, Mediterranean | Parablennius gattorugine |
| Hoki | Gadiformes | Offshore waters of New Zealand and southern Australia | Macruronus novaezelandiae |
| Holacanthus | Perciformes | Coral reefs, western Atlantic | Holacanthus ciliaris |
| Holcomycteronus | Ophidiiformes | Deep-sea, abyssal | Holcomycteronus profundissimus |
| Holdfast Clinid | Blenniiformes | Coastal, rocky shores, South Africa | Clinus superciliousus |
| Hole-in-the-head Goby | Gobiiformes | Sandy bottoms, Indo-Pacific | Signigobius biocellatus |
| Holland's Bream | Perciformes | Indo-Pacific marine | Argyrops sp. |
| Holland's Goby | Perciformes | Marine & Brackish | Gobius niger |
| Hollandichthys | Characiformes | Southeastern Brazil | Hollandichthys multifasciatus |
| Hollardia | Tetraodontiformes | Marine | Hollardia |
| Holobenthos | Batrachoidiformes | Marine | Holobenthos |
| Holocanthus clarionensis | Perciformes | Marine (Pacific) | Holacanthus clarionensis |
| Holocentrus | Holocentriformes | Coral reefs, tropical Atlantic | Holocentrus adscensionis |
| Holocentrus rufus | Holocentriformes | Marine (Atlantic) | Holocentrus rufus |
| Holocentrus vexillarius | Holocentriformes | Marine (Atlantic) | Holocentrus vexillarius |
| Holocephali | Chimaeriformes | Deep-sea, temperate and cold waters | Chimaera monstrosa |
| Holocephalus | Chimaeriformes | Deep-sea | Holocephalus sp. |
| Holocnemus | Araneae | Terrestrial (Not a fish – correction for potential misidentification) | Holocnemus pluchei |
| Holocynus | Characiformes | Freshwater | Holocynus |
| Holohalaelurus | Carcharhiniformes | Deep-sea, eastern Atlantic | Holohalaelurus regani |
| Holonema | Chimaeriformes | Marine (deep sea) | Holonema rugosum |
| Homaloptera | Cypriniformes | Freshwater, Southeast Asia | Homaloptera stephensoni |
| Homeric Mudskipper | Perciformes | Brackish & Marine | Periophthalmus waltoni |
| Hondo Perch | Perciformes | Coastal, East Asia | Lateolabrax japonicus |
| Honey Gourami | Anabantiformes | Freshwater, South Asia | Trichogaster chuna |
| Honeycomb Cardinalfish | Perciformes | Marine | Sphaeramia nematoptera |
| Honeycomb Coral Grouper | Perciformes | Marine (Indo-Pacific) | Epinephelus merra |
| Honeycomb Cowfish | Tetraodontiformes | Marine | Acanthostracion polygonius |
| Honeycomb Eel | Anguilliformes | Marine | Gymnothorax favagineus |
| Honeycomb Grouper | Perciformes | Coral reefs, Indo-Pacific | Epinephelus merra |
| Honeycomb Moray | Anguilliformes | Coral reefs, Indo-Pacific | Gymnothorax favagineus |
| Honeycomb Stingray | Myliobatiformes | Coastal, Indo-Pacific | Himantura uarnak |
| Hook-jawed Eel | Anguilliformes | Deep-sea, Atlantic | Nettastoma melanura |
| Hookear Scavenger | Perciformes | Coral reefs, Indo-Pacific | Lethrinus miniatus |
| Hookfin Angler (Deep-sea) | Lophiiformes | Marine (Deep-sea) | Melanocetus johnsonii |
| Hookjaw Moray | Anguilliformes | Marine | Enchelycore anatina |
| Hooknose Gurnard | Perciformes | Coastal marine | Paratrigla vanessa |
| Hope's Cod | Gadiformes | Cold temperate, North Atlantic | Gadus morhua |
| Hopkins' Flounder | Pleuronectiformes | Coastal, eastern Pacific | Pleuronichthys ritteri |
| Hoplarchus | Cichliformes | Freshwater, South America | Hoplarchus psittacus |
| Hopliancistrus | Siluriformes | South American freshwaters | Hopliancistrus tricomis |
| Hoplias | Characiformes | Central and South American freshwaters | Hoplias malabaricus |
| Hoplocephalus | Elapidae | Terrestrial (Australia) | Hoplocephalus bungei |
| Hoplocoryphis | Perciformes | Deep-water, Indo-Pacific | Hoplocoryphis brachyrhynchus |
| Hoplognathus | Perciformes | Coastal, rocky reefs, western Pacific | Hoplognathus punctatus |
| Hoplolatilus | Perciformes | Rubbly bottoms, Indo-Pacific | Hoplolatilus purpureus |
| Hoplopagrus | Perciformes | Marine (Eastern Pacific) | Hoplopagrus guentherii |
| Hoplopteryx | Tetraodontiformes | Extinct (Cretaceous) | Hoplopteryx fischeri |
| Hoplosternum | Siluriformes | South American freshwaters | Hoplosternum thoracatum |
| Hoplostethus | Beryciformes | Deep-sea, cosmopolitan | Hoplostethus atlanticus |
| Hoplunnis | Synbranchiformes | Freshwater, South America | Hoplunnis tenuis |
| Horabagrus | Siluriformes | Freshwater | Horabagrus |
| Horadore | Perciformes | Freshwater (South America) | Horadore tucumanus |
| Horn Shark | Heterodontiformes | Coastal, eastern Pacific | Heterodontus francisci |
| Horn Shark (California) | Heterodontiformes | Marine | Heterodontus francisci |
| Horn Shark (Crested) | Heterodontiformes | Marine | Heterodontus galeatus |
| Horn Shark (Japanese) | Heterodontiformes | Marine | Heterodontus japonicus |
| Horn Shark (Mexican) | Heterodontiformes | Marine | Heterodontus mexicanus |
| Horn Shark (Oman) | Heterodontiformes | Marine | Heterodontus omanensis |
| Horn Shark (Port Jackson) | Heterodontiformes | Marine | Heterodontus portusjacksoni |
| Horn Shark (Zebra) | Heterodontiformes | Marine | Heterodontus zebra |
| Horned Batfish | Lophiiformes | Deep sea | Malthopsis cornuta |
| Horned Blenny | Blenniiformes | Coastal marine | Parablennius tentacularis |
| Horned Cardinalfish | Perciformes | Coral reefs, Indo-Pacific | Apogon hornedus |
| Horned Cod | Gadiformes | Marine (Atlantic) | Macrourus berglax |
| Horned Croaker | Perciformes | Marine | Ophioscion sciera |
| Horned Fin Triggerfish | Tetraodontiformes | Marine | Balistes vetula |
| Horned Flathead | Scorpaeniformes | Coastal, Indo-Pacific | Platycephalus indicus |
| Horned Frogfish | Lophiiformes | Indo-Pacific coral reefs | Antennarius cucullatus |
| Horned Gurnard | Scorpaeniformes | Marine | Dactyloptena orientalis |
| Horned Lizardfish | Aulopiformes | Coastal marine | Synodus capricornis |
| Horned Nautilus | Nautilida | Marine (Indo-Pacific) | Nautilus pompilius |
| Horned Pompano | Carangiformes | Coastal marine | Alectis ciliaris (juvenile) |
| Horned Puffer | Tetraodontiformes | Marine | Lactoria cornuta |
| Horned Rockfish | Scorpaeniformes | Marine | Sebastes paucispinis |
| Horned Sculpin | Scorpaeniformes | Marine & Freshwater | Myoxocephalus quadricornis |
| Horned Seahorse | Syngnathiformes | Marine | Hippocampus coronatus |
| Horned Shark | Heterodontiformes | Coastal marine | Heterodontus francisci |
| Horned Stingray | Myliobatiformes | Coastal, Indo-Pacific | Himantura fai |
| Horned Surgeonfish | Acanthuriformes | Marine | Naso unicornis |
| Horned Toadfish | Batrachoidiformes | Marine (Caribbean) | Batrachus coheni |
| Hornet Perch | Scorpaeniformes | Marine (Indo-Pacific) | Platycephalus indicus |
| Hornetfish | Scorpaeniformes | Eastern Australia | Notesthes robusta |
| Hornpapilla | Perciformes | Freshwater, Lake Malawi | Melanochromis auratus |
| Horse Mackerel | Perciformes | Pelagic marine | Trachurus trachurus |
| Horse Mackerel Scad | Perciformes | Pelagic, Atlantic | Trachurus trachurus |
| Horse Piranha | Characiformes | South America | Serrasalmus rhombeus |
| Horse Tang | Acanthuriformes | Marine | Acanthurus nigricans |
| Horse-eye Jack | Carangiformes | Coastal, tropical Atlantic | Caranx latus |
| Horsefish | Perciformes | Coastal marine | Congiopodus spinifer |
| Horsehead Seahorse | Syngnathiformes | Marine (Atlantic) | Hippocampus reidi |
| Horseshoe Batfish | Ephippiformes | Marine | Platax boersii |
| Horseshoe Crab | Xiphosura | Marine (Atlantic) | Limulus polyphemus |
| Horseshoe Leatherjacket | Tetraodontiformes | Marine | Meuschenia hippocrepis |
| Hosmer's Perch | Perciformes | Freshwater (Extinct) | Perca hosmeri |
| Hotlips Goby | Gobiiformes | Mediterranean Sea | Didogobius splechtnai |
| Hottentot | Perciformes | Coastal waters off South Africa | Pachymetopon blochii |
| Hottentot Seabream | Perciformes | Coastal, southern Africa | Pachymetopon blochii |
| Houbara | Perciformes | Marine | Oxycirrhites typus |
| Houndfish | Beloniformes | Tropical and subtropical waters worldwide | Tylosurus crocodilus |
| Houndfish Needlenose Gar | Beloniformes | Coastal, tropical | Tylosurus crocodilus |
| Houndshark | Carcharhiniformes | Temperate waters worldwide | Galeorhinus galeus |
| House Goby | Gobiiformes | Coastal, Indo-Pacific | Bathygobius kokleprisis |
| Houting | Osmeriformes | Freshwater and brackish waters of Eurasia (extinct in some areas) | Coregonus oxyrinchus |
| Hovercraft | Gobiiformes | Marine/Brackish (Indo-Pacific) | Oligolepis acutipennis |
| Hovercraft Lizardfish | Aulopiformes | Sandy bottoms, Indo-Pacific | Synodus hoshinonis |
| Howella | Perciformes | Deep-sea pelagic | Howella brodiei |
| Huachinango | Perciformes | Coastal, western Atlantic | Lutjanus campechanus |
| Hubbs' Anchovy | Clupeiformes | Coastal, western Atlantic | Anchoa hubbsi |
| Hubbs' Pipefish | Syngnathiformes | Coastal, western Atlantic | Syngnathus hubbsi |
| Huchen | Salmoniformes | Freshwater, Europe | Hucho hucho |
| Hucho | Salmoniformes | Freshwaters of Europe and Asia | Hucho hucho |
| Hucho (Sakhalin) | Salmoniformes | Freshwater | Hucho perryi |
| Hucho (Siberian) | Salmoniformes | Freshwater | Hucho taimen |
| Hucho hucho | Salmoniformes | Freshwater | Hucho hucho |
| Hucho ishikawai | Salmoniformes | Freshwater | Hucho ishikawai |
| Hucho taimen | Salmoniformes | Freshwater | Hucho taimen |
| Huchonema | Myxiniformes | Marine (Extinct jawless fish) | Huchonema |
| Humbug Damselfish | Pomacentridae | Indo-Pacific coral reefs | Dascyllus aruanus |
| Humbug Dascyllus | Perciformes | Coral reefs, Indo-Pacific | Dascyllus aruanus |
| Humbug Perchlet | Perciformes | Freshwaters of Australia | Ambassis agassizii |
| Hummingbird Filefish | Tetraodontiformes | Coral reefs, Indo-Pacific | Pseudalutarius nasicornis |
| Hummingbird Fish | Perciformes | Deep-sea soles | Symphurus chabanaudi |
| Hummingbird Goby | Gobiiformes | Marine | Stonogobiops nematodes |
| Humpback Anglerfish | Lophiiformes | Deep waters worldwide | Melanocetus johnsonii |
| Humpback Anthias | Perciformes | Deep-water, Indo-Pacific | Odontanthias fuscipinnis |
| Humpback Ceratioid | Lophiiformes | Marine (Deep-sea) | Melanocetus johnsonii |
| Humpback Cod | Gadiformes | Tropical marine waters | Bregmaceros macclellandii |
| Humpback Flounder | Pleuronectiformes | Marine | Psettodes erumei |
| Humpback Grouper | Perciformes | Coral reefs of the Indo-Pacific | Cromileptes altivelis |
| Humpback Hakes | Gadiformes | Marine | Macruronus novaezelandiae |
| Humpback Hogfish | Perciformes | Coral reefs, Indo-Pacific | Bodianus axillaris |
| Humpback Mahseer | Cypriniformes | Freshwater | Tor remadevii |
| Humpback Puffer | Tetraodontiformes | Coastal, Indo-Pacific | Tetrosomus gibbosus |
| Humpback Red Snapper | Perciformes | Marine (Indo-Pacific) | Lutjanus gibbus |
| Humpback Scorpionfish | Scorpaeniformes | Marine | Scorpaenopsis gibbosa |
| Humpback Snapper | Perciformes | Coral reefs and rocky areas of the Indo-Pacific | Lutjanus gibbus |
| Humpback Unicornfish | Acanthuriformes | Coral reefs, Indo-Pacific | Naso brachycentron |
| Humpbacked Coralfish | Perciformes | Marine | Chaetodon nippon |
| Humpbacked Grouper | Perciformes | Marine | Epinephelus lanceolatus |
| Humphead Bannerfish | Perciformes | Marine | Heniochus varius |
| Humphead Maori Wrasse | Labriformes | Marine | Cheilinus undulatus |
| Humphead Snapper | Lutjaniformes | Indo-Pacific coral reefs | Lutjanus gibbus |
| Humphead Whiptail | Perciformes | Coral reefs, Indo-Pacific | Pentapodus bifasciatus |
| Humphead Wrasse | Perciformes | Coral reefs of the Indo-Pacific | Cheilinus undulatus |
| Humpheaded Glassfish | Perciformes | Freshwater, South Asia | Parambassis lala |
| Humphrey's Cardinalfish | Perciformes | Coral reefs, Indo-Pacific | Apogon humphreyi |
| Humphrey's Pipefish | Syngnathiformes | Marine | Corythoichthys ocellatus |
| Humpty Dumpty | Lophiiformes | Coral reefs, Indo-Pacific | Antennarius commerson |
| Humpy | Salmoniformes | Marine & Freshwater | Oncorhynchus gorbuscha |
| Humpy Blenny | Perciformes | Marine | Acanthemblemaria crockeri |
| Humuhumunukunukuapua'a | Tetraodontiformes | Indo-Pacific | Rhinecanthus rectangulus |
| Hunter River Silver Biddy | Perciformes | Marine & Brackish | Gerres equulus |
| Hunter's Flounder | Pleuronectiformes | Marine (Indo-Pacific) | Pseudorhombus arsius |
| Huntsmanfish | Perciformes | Pelagic, host-associated | Echeneis naucrates |
| Huso dauricus | Acipenseriformes | Freshwater & Brackish | Huso dauricus |
| Huso huso | Acipenseriformes | Freshwater & Brackish | Huso huso |
| Hussar | Perciformes | Western Pacific Ocean | Lutjanus adetti |
| Hussar Snapper | Perciformes | Marine | Lutjanus adetti |
| Hyacinth Goby | Gobiiformes | Coral reefs, Indo-Pacific | Stonogobiops yasha |
| Hydiantherium | Scombriformes | Marine (deep sea) | Ruvettus pretiosus |
| Hydra | Syngnathiformes | Temperate waters of Southern Australia | Hypselognathus horridus |
| Hydrargos | Cypriniformes | Freshwaters of China | Hydrargos hoggii |
| Hydrargyrum | Element | Not a fish (Mercury – correction for potential misidentification) | Hg |
| Hydrocynus | Characiformes | Freshwater, Africa | Hydrocynus vittatus |
| Hydrocynus Vittatus | Characiformes | Freshwater (Africa) | Hydrocynus vittatus |
| Hydrocynus brevis | Characiformes | Freshwater | Hydrocynus brevis |
| Hydrocynus goliath | Characiformes | Freshwater | Hydrocynus goliath |
| Hydrocynus vittatus | Characiformes | Freshwater | Hydrocynus vittatus |
| Hydrolagus | Chimaeriformes | North Pacific deep waters | Hydrolagus colliei |
| Hydrolycus | Characiformes | South American freshwaters | Hydrolycus scomberoides |
| Hydrolycus scomberoides | Characiformes | Freshwater | Hydrolycus scomberoides |
| Hydrolycus tatauaia | Characiformes | Freshwater | Hydrolycus tatauaia |
| Hygophum | Myctophiformes | Deep-sea pelagic | Hygophum hygomii |
| Hymenocephalus | Gadiformes | Deep-sea Atlantic and Mediterranean | Hymenocephalus italicus |
| Hynnodus | Aulopiformes | Deep-sea, Indo-Pacific | Hynnodus rorida |
| Hypamesus | Osmeriformes | Marine | Hypamesus |
| Hypancistrus | Siluriformes | Freshwater, South America | Hypancistrus zebra |
| Hypentelium | Cypriniformes | Freshwaters of North America | Hypentelium nigricans |
| Hyperoglyphe | Perciformes | Marine | Hyperoglyphe |
| Hyperoplus | Perciformes | North Atlantic and Baltic Sea | Hyperoplus lanceolatus |
| Hyphessobrycon | Characiformes | Freshwater, South America | Hyphessobrycon eques |
| Hyphessobrycon amandae | Characiformes | Freshwater | Hyphessobrycon amandae |
| Hyphessobrycon anisitsi | Characiformes | Freshwater | Hyphessobrycon anisitsi |
| Hyphessobrycon bentosi | Characiformes | Freshwater | Hyphessobrycon bentosi |
| Hyphessobrycon callistus | Characiformes | Freshwater | Hyphessobrycon callistus |
| Hyphessobrycon eques | Characiformes | Freshwater | Hyphessobrycon eques |
| Hyphessobrycon erythrostigma | Characiformes | Freshwater | Hyphessobrycon erythrostigma |
| Hyphessobrycon herbertaxelrodi | Characiformes | Freshwater | Hyphessobrycon herbertaxelrodi |
| Hyphessobrycon innesi | Characiformes | Freshwater | Hyphessobrycon innesi |
| Hyphessobrycon loretoensis | Characiformes | Freshwater | Hyphessobrycon loretoensis |
| Hyphessobrycon luederwaldti | Characiformes | Freshwater | Hyphessobrycon luederwaldti |
| Hyphessobrycon megalopterus | Characiformes | Freshwater | Hyphessobrycon megalopterus |
| Hyphessobrycon minor | Characiformes | Freshwater | Hyphessobrycon minor |
| Hyphessobrycon pulchripinnis | Characiformes | Freshwater | Hyphessobrycon pulchripinnis |
| Hyphessobrycon pyrrhonotus | Characiformes | Freshwater (South America) | Hyphessobrycon pyrrhonotus |
| Hyphessobrycon rosaceus | Characiformes | Freshwater | Hyphessobrycon rosaceus |
| Hyphessobrycon sweglesi | Characiformes | Freshwater | Hyphessobrycon sweglesi |
| Hypleurochilus | Perciformes | Marine | Hypleurochilus |
| Hypnos | Torpediniformes | Coastal, Australia | Hypnos monopterygius |
| Hypoatherina | Atheriniformes | Coastal, Indo-Pacific | Hypoatherina valenciennei |
| Hypogaleus | Carcharhiniformes | Deep-water, Western Pacific | Hypogaleus hyugaensis |
| Hypomesus | Osmeriformes | Coastal, North Pacific | Hypomesus pretiosus |
| Hypophthalmichthys | Cypriniformes | Freshwater | Hypophthalmichthys |
| Hypophthalmichthys molitrix | Cypriniformes | Freshwater | Hypophthalmichthys molitrix |
| Hypophthalmichthys nobilis | Cypriniformes | Freshwater | Hypophthalmichthys nobilis |
| Hypopion | Siluriformes | Freshwater (Extinct) | Hypopion |
| Hypoplectrus | Perciformes | Coral reefs, western Atlantic | Hypoplectrus unicolor |
| Hypoplectrus gemma | Perciformes | Marine | Hypoplectrus gemma |
| Hypoplectrus indigo | Perciformes | Marine | Hypoplectrus indigo |
| Hypoplectrus unicolor | Perciformes | Marine | Hypoplectrus unicolor |
| Hypopomus | Gymnotiformes | Freshwater, South America | Hypopomus artedi |
| Hypoptopoma | Siluriformes | Freshwater, South America | Hypoptopoma thoracatum |
| Hypoptychus | Perciformes | North Pacific Ocean | Hypoptychus dybowskii |
| Hyporamphus | Beloniformes | Coastal, Indo-Pacific | Hyporamphus quoyi |
| Hyporhamphus | Beloniformes | Tropical and subtropical marine waters | Hyporhamphus unifasciatus |
| Hyposalarius | Perciformes | Marine | Hyposalarius |
| Hypostomus | Siluriformes | South American freshwaters | Hypostomus plecostomus |
| Hypostomus cochliodon | Siluriformes | Freshwater (South America) | Hypostomus cochliodon |
| Hypostomus punctatus | Siluriformes | South American freshwaters | Hypostomus punctatus |
| Hyposygnathus | Syngnathiformes | Indo-Pacific marine | Hyposygnathus draco |
| Hypseleotris | Gobiiformes | Freshwater | Hypseleotris |
| Hypseleotris compressa | Gobiiformes | Freshwater | Hypseleotris compressa |
| Hypselobarbus | Cypriniformes | Freshwater, India | Hypselobarbus curmuca |
| Hypsiopomus | Perciformes | Marine | Hypsiopomus sp. |
| Hypsipops rubicundus | Perciformes | Marine | Hypsipops rubicundus |
| Hypsistius | Perciformes | Marine | Hypsistius |
| Hypsoblennius | Blenniiformes | Western Atlantic | Hypsoblennius hentz |
| Hypsolebias | Cyprinodontiformes | Freshwater | Hypsolebias |
| Hypsolebias flammeus | Cyprinodontiformes | Freshwater | Hypsolebias flammeus |
| Hypsolebias magnificus | Cyprinodontiformes | Freshwater | Hypsolebias magnificus |
| Hypsolebias tocantinensis | Cyprinodontiformes | Freshwater | Hypsolebias tocantinensis |
| Hypsoperus | Perciformes | Marine | Hypsoperus sp. |
| Hypsophrys | Cichliformes | Freshwaters of Central America | Hypsophrys nicaraguensis |
| Hypsophrys nicaraguensis | Cichliformes | Freshwaters of Central America | Hypsophrys nicaraguensis |
| Hypsurus | Perciformes | Marine | Hypsurus caryi |
| Hypsurus caryi | Perciformes | Marine (Pacific) | Hypsurus caryi |
| Hypsypops | Perciformes | Coastal, eastern Pacific | Hypsypops rubicundus |
| Hypsypops rubicundus | Perciformes | Marine | Hypsypops rubicundus |