Endangered fish face many of the same issues that land animals encounter. Their survival depends heavily on their environment and with the rising pollution levels and global warming many fish species find it hard to adapt to their changing climate.
Below is a list of fish who have been deemed endangered. These fish are rarely seen or photographed and some may even be on the brink of extinction.
Species Name
- Acadian Whitefish
- Acanthobrama centisquama
- Acanthobrama telavivensis
- Achondrostoma arcasii
- Achondrostoma occidentale
- Adamson’s Grunter
- Aden Gulf Torpedo
- Adriatic Salmon
- Adriatic Sturgeon
- Aegean Minnow
- African Blind Barb Fish
- African Butter Catfish
- African Wedgefish
- Airsac Catfish
- Ala Balik
- Alabama Cavefish
- Alabama Shad
- Alabama Sturgeon
- Alberca Silverside
- Albert Lates
- Alburnus belvica
- Alburnus orontis
- Alburnus qalilus
- Alosa vistonica
- Alvord Chub
- Amber Darter
- Ammersee Kilch
- Amur Sturgeon
- Anaecypris hispanica
- Andean Catfish
- Angel Shark
- Anguila Ciega
- Angular Angelshark
- Angular Rough Shark
- Annual Tropical Killifish
- Anthias salmopunctatus
- Anthias regalis
- Apache Trout
- Aphanius iberus
- Aphanius burduricus
- Aphanius almiriensis
- Aphanius baeticus
- Aphanius transgrediens
- Aphanius splendens
- Aphanius sirhani
- Aphanius richardsoni
- Apron Ray
- Arfak Rainbowfish
- Argentine Angel Shark
- Ariakehimeshirauo
- Aristochromis Deep
- Arius bonillai
- Arius festinus
- Arius uncinatus
- Arno Goby
- Arthurs Paragalaxias
- Ashy Darter
- Asian Bonytongue
- Asoka Barb
- Asprete
- Atlantic Cod
- Atlantic Halibut
- Atlantic Salmon
- Atlantic Sawtail Catshark
- Aulonocara steveni
- Aulonocara kandeense
- Aulonocara maylandi
- Aulonocara aquilonium
- Aulonocara auditor
- Aulonocara ethelwynnae
- Aulonocara hansbaenschi
- Aulonocara korneliae
- Aulonocara hueseri
- Aulonocara nyassae
- Australian Grayling
- Austrolebias cinereus
- Ayumodoki
- Bagangan
- Bagre De Rio Verde
- Bagre De Yaqui
- Balsas Splitfin
- Baltic Sturgeon
- Banded Eagle Ray
- Banded Neolebias
- Banded Wobbegong
- Bandula Barb
- Banggai Cardinalfish
- Baolan
- Baramundi Cod
- Barbatula eregliensis
- Barbatula simavica
- Barbatula tschaiyssuensis
- Barbatula seyhanensis
- Barbatula samantica
- Barbus calidus
- Barbus brevipinnis
- Barbus amatolicus
- Barbus motebensis
- Barbus trevelyani
- Barbus alluaudi
- Barbus treurensis
- Barbus tauricus
- Barbus chantrei
- Barbus andrewi
- Barbus claudinae
- Barbus quadralineatus
- Barbus macrolepis
- Barbus serra
- Barbus caninus
- Barbus choloensis
- Barbus haasi
- Barbus sp. nov. ‘Chimanimani’
- Barbus pseudotoppini
- Barbus sp. nov. ‘Banhine’
- Barbus acuticeps
- Barbus euboicus
- Barbus reinii
- Barbus serengetiensis
- Barbus sperchiensis
- Barbus sp. nov. ‘Waterberg’
- Barbus sp. nov. ‘Pangani’
- Barbus sp. nov. ‘Nzoia’
- Barbus prespensis
- Barbus paytonii
- Barbus ruasae
- Barbus huloti
- Barbus issenensis
- Barbus harterti
- Barbus ksibi
- Barbus laticeps
- Barbus longiceps
- Barbus lufukiensis
- Barbus meridionalis
- Barbus erubescens
- Barbus nasus
- Barbour’s Seahorse
- Bareback Shovelnose Ray
- Baringo
- Barnard’s Rock-catfish
- Barndoor Winter Skate
- Barred Danio
- Barred Galaxias
- Barrens Topminnow
- Basking Shark
- Bastard Sturgeon
- Batrachus uranoscopus
- Bear Lake Sculpin
- Beautiful Shiner
- Bedotia madagascariensis
- Bedotia marojejy
- Bedotia sp. nov. ‘Ankavia-Ankavanana’
- Bedotia sp. nov. ‘Bemarivo’
- Bedotia sp. nov. ‘Betampona’
- Bedotia sp. nov. ‘Lazana’
- Bedotia sp. nov. ‘Mahanara’
- Bedotia masoala
- Bedotia sp. nov. ‘Nosivola’
- Bedotia sp. nov. ‘Namorona’
- Bedotia geayi
- Bedotia tricolor
- Bedotia sp. nov. ‘Manombo’
- Bedotia sp. nov. ‘Vevembe’
- Bedotia sp. nov. ‘Sambava’
- Beloribitsa
- Bentfin Devil Ray
- Berg River Redfin
- Betta chloropharynx
- Betta simplex
- Betta burdigala
- Betta miniopinna
- Betta livida
- Betta spilotogena
- Betta tomi
- Betta chini
- Betta persephone
- Betta macrostoma
- Betta hipposideros
- Big Bend Gambusia
- Big White Fish
- Bigeye Lates
- Bigeye Tuna
- Bignose Fanskate
- Bitungu
- Bizant River Shark
- Black Cod
- Black Grouper
- Black Mogurnda
- Black Rockfish
- Black Sea Bass
- Black-blotched Stingray
- Black-Finned Goodeid
- Blackchin Guitarfish
- Blackfin Pupfish
- Blackmouth Shiner
- Blacksaddled Coral Grouper
- Blackspot Shark
- Blackspot Skate
- Blackspot Tuskfish
- Bleher’s Rainbowfish
- Blind Cave Fish
- Blind Loach
- Blind Naked-belly Barbel
- Bloater
- Blotched Mogurnda
- Blotchside Logperch
- Blue Shiner
- Blue Skate
- Bluebarred Pygmy Sunfish
- Bluegray Carpetshark
- Bluemask Darter
- Bluespotted Bamboo Shark
- Bluestripe Darter
- Bluetail Glass Barb
- Bluntnose Shiner
- Bocaccio Rockfish
- Boeseman’s Rainbowfish
- Bold Characodon
- Bondelle
- Bonytail Chub
- Borax Lake Chub
- Borneo Shark
- Boroda expatria
- Bot River Klipfish
- Bottlenose Skate
- Boulder Darter
- Bowmouth Guitarfish
- Boxer Pupfish
- Brasilia Lyrefin
- Brazilian Blind Electric Ray
- Brazilian Cownose Ray
- Brazilian Guitarfish
- Brick Seamoth
- Brindle Bass
- Broadnose Wedgefish
- Bronze Whaler
- Brown Stingray
- Brown-marbled Grouper
- Brown-reticulate Stingray
- Brown-spotted Catshark
- Brown-spotted Rockcod
- Brownband Numbfish
- Brownstriped Grunt
- Bullseye Electric Ray
- Bumphead Parrotfish
- Cachorrito Cabezon
- Cachorrito De Charco Azul
- Cachorrito De Dorsal Larga
- Cachorrito De Mezquital
- Cachorrito Enano De Potosi
- Caddo Madtom
- Caecocypris basimi
- Cahaba Shiner
- Cairns Rainbowfish
- Calico Grouper
- California Sheephead
- Camouflage Grouper
- Canterbury Mudfish
- Canthigaster rapaensis
- Cape Fear Shiner
- Cape Seahorse
- Cape Shark
- Capoeta antalyensis
- Captain Fine
- Carbonera Pupfish
- Caribbean Electric Ray
- Caribbean Reef Shark
- Carpione Del Garda
- Caspian Lamprey
- Catshark
- Cave Catfish
- Cephalakompsus pachycheilus
- Chaetodon obliquus
- Charal De Alchichica
- Charal De La Preciosa
- Charal De Quechulac
- Charalito Chihuahua
- Charalito Saltillo
- Charalito Sonorense
- Chathams Galaxias
- Checkered Pupfish
- Chiloglanis lufirae
- Chiloglanis ruziziensis
- Chinese Bahaba
- Chinese Paddlefish
- Chinese Sturgeon
- Chinook Salmon
- Chondrostoma meandrense
- Chondrostoma vardarense
- Chondrostoma prespense
- Chondrostoma knerii
- Chondrostoma kinzelbachi
- Chondrostoma soetta
- Chondrostoma beysehirense
- Chondrostoma phoxinus
- Chornaya Gudgeon
- Cicek Minnow
- Clanwilliam Rock Catfish
- Clanwilliam Sandfish
- Clanwilliam Yellowfish
- Clarence Galaxias
- Clarence River Cod
- Clariallabes mutsindoziensis
- Clarias maclareni
- Clear Creek Gambusia
- Clubnose Guitarfish
- Clupeonella abrau
- Coastal Stingaree
- Cobitis stephanidisi
- Cobitis puncticulata
- Cobitis illyrica
- Cobitis bilseli
- Cobitis taurica
- Cobitis punctilineata
- Cobitis hellenica
- Cobitis paludica
- Cobitis narentana
- Cobitis meridionalis
- Cobitis maroccana
- Cobitis levantina
- Cobitis trichonica
- Cobitis dalmatina
- Cobitis turcica
- Cobitis vettonica
- Cobitis zanandreai
- Cobitis arachthosensis
- Cobitis calderoni
- Coelacanth
- Coho Salmon
- Colares Stingray
- Coldwater Darter
- Colombian Electric Ray
- Colorado Grouper
- Colorado Pikeminnow
- Comanche Springs Pupfish
- Comb Grouper
- Common Guitarfish
- Common Sawfish
- Common Seadragon
- Common Seahorse
- Common Shovelnose Ray
- Conasauga Logperch
- Conchos Shiner
- Congo Blackfin
- Copadichromis conophorus
- Copadichromis boadzulu
- Copadichromis cyclicos
- Copadichromis geertsi
- Copadichromis verduyni
- Copadichromis mbenji
- Copadichromis atripinnis
- Copadichromis trewavasae
- Copadichromis nkatae
- Copadichromis thinos
- Copper Redhorse
- Coppercheek Darter
- Coral Catshark
- Coral Trout
- Corfu Toothcarp
- Cottus petiti
- Cotuero Toadfish
- Cousseau’s Skate
- Cowfish
- Crimea Shemaya
- Crimean Tatar Goby
- Crossband Rockfish
- Crown Shark
- Crystal Darter
- Ctenochromis aff. pectoralis
- Cuatro Cienegas Shiner
- Cubera Snapper
- Cui-ui
- Cuphead Skate
- Curry Shark
- Cynotilapia axelrodi
- Cynotilapia zebroides
- Cyrano Spurdog
- Dabry’s Sturgeon
- Daggernose Shark
- Dalhousie Goby
- Dalhousie Hardyhead
- Dalmatian Barbel-gudgeon
- Dama Ciega Blanca
- Danube Salmon
- Dardo De Conchos
- Darkedged Splitfin
- Darling River Hardyhead
- Dasyatis fluviorum
- Deepwater Jack
- Deepwater Spiny Dogfish
- Delminichthys adspersus
- Delminichthys krbavensis
- Delminichthys ghetaldii
- Delminichthys jadovensis
- Delta Smelt
- Dere Kayasi
- Dermogenys weberi
- Desert Dace
- Desert Pupfish
- Devil Fish
- Devil’s Hole Pupfish
- Devil’s River Minnow
- Dianchi Bullhead
- Dianchi Carp
- Dikume
- Dinotopterus cunningtoni
- Dionda dichroma
- Disa
- Distichodus petersii
- Doiran Bleak
- Donkey Fish
- Draughtboard Shark
- Duck-billed Buntingi
- Duck-billed Golden-line Fish
- Duckbill Cat
- Dumb Gulper Shark
- Dusky Grouper
- Duskytail Darter
- Duskytail Grouper
- Dwarf Bigeye Scraper
- Dwarf Galaxias
- Dwarf Inanga
- Dwarf Loach
- Dwarf Pygmy Goby
- Dwarf Sawfish
- Easter Island Butterflyfish
- Eastern Angel Shark
- Eastern Cape Redfin
- Eastern Cape Rocky
- Eastern Carpathian Golden Loach
- Eastern Longnose Spurdog
- Eastern Sand Darter
- Eastern Sawshark
- Eastern Shovelnose Stingaree
- Edgbaston Goby
- Egg-carrying Buntingi
- Eleotris pellegrini
- Elizabeth Springs Goby
- Ellinopygosteos
- Elongate Bitterling
- Encheloclarias prolatus
- Encheloclarias tapeinopterus
- Encheloclarias kelioides
- Encheloclarias curtisoma
- Estuary Cod
- Etowah Darter
- European Eel
- European Mudminnow
- Ewaso Nyiro Labeo
- Eyeless Golden-line Fish
- Eyespot Skate
- False Shovelnose Sturgeon
- Fibreno Trout
- Fiddlefish
- Fiery Redfin
- Fire Blue Hap
- Fissi
- Flapnose Houndshark
- Flapnose Ray
- Flat-faced Seahorse
- Flat-headed Galaxias
- Forktail Lates
- Fossil Shark
- Fountain Darter
- Freckled Darter
- Freshwater Sawfish
- Freycinet’s Epaulette Shark
- Frilled Shark
- Gabriella’s Grouper
- Galapagos Shark
- Ganges Shark
- Ganges Stingray
- Garra ghorensis
- Garra longipinnis
- Garra dunsirei
- Garra barreimiae
- Gejiu Blind Loach
- Ghizani
- Giant Butterfly Ray
- Giant Devilray
- Giant Freshwater Stingray
- Giant Guitarfish
- Giant Kokopu
- Giant Pangasius
- Giant Sturgeon
- Giant Wrasse
- Gibbibarbus cyphotergous
- Gila Chub
- Gila Topminnow
- Gila Trout
- Gillaroo
- Ginger Pearlfish
- Glass Blue-eye
- Glauerts Seadragon
- Glossogobius flavipinnis
- Glossogobius ankaranensis
- Glossogobius intermedius
- Glossogobius matanensis
- Glovers Hardyhead
- Golden Cownose Ray
- Golden Grouper
- Golden Line Fish
- Goldline Darter
- Goledn-line Angle Fish
- Goliath Grouper
- Goodeid
- Goureen
- Graham’s Cichlid
- Gray Nurse Shark
- Graytail Skate
- Great Stingaree
- Great White Shark
- Greek Brook Lamprey
- Green Labeo
- Green Sturgeon
- Greenback Stingaree
- Greenland Shark
- Grey Bamboo Shark
- Guayacon Bocon
- Guayacon De Cuatro Cienegas
- Guayacon De Hacienda Dolores
- Guayacon De San Gregorio
- Gulf Grouper
- Gulf Sturgeon
- Gulper Shark
- Gwyniad
- Haddock
- Hammerhead Shark
- Hampala lopezi
- Haplochromis plagiodon
- Haplochromis worthingtoni
- Haplochromis plagiostoma
- Haplochromis phytophagus
- Haplochromis perrieri
- Haplochromis microdon
- Haplochromis prodromus
- Haplochromis simpsoni
- Haplochromis paropius
- Haplochromis nuchisquamulatus
- Haplochromis piceatus
- Haplochromis mento
- Haplochromis melanopterus
- Haplochromis flaviijosephi
- Haplochromis annectidens
- Haplochromis erythromaculatus
- Haplochromis desfontainii
- Haplochromis cyaneus
- Haplochromis cryptodon
- Haplochromis cavifrons
- Haplochromis beadlei
- Haplochromis bayoni
- Haplochromis barbarae
- Haplochromis flavus
- Haplochromis granti
- Haplochromis megalops
- Haplochromis lividus
- Haplochromis maxillaris
- Haplochromis brownae
- Haplochromis maculipinna
- Haplochromis latifasciatus
- Haplochromis ishmaeli
- Haplochromis howesi
- Haplochromis heusinkveldi
- Haplochromis guiarti
- Haplochromis argenteus
- Haplochromis victorianus
- Haplochromis velifer
- Haplochromis obliquidens
- Haplochromis laprogramma
- Haplochromis labiatus
- Haplochromis katavi
- Haplochromis crassilabris
- Haplochromis chilotes
- Haplochromis aeneocolor
- Haplochromis aelocephalus
- Haplochromis chromogynos
- Haplochromis acidens
- Haplochromis pyrrhocephalus
- Haplochromis welcommei
- Haplochromis tweddlei
- Haplochromis serranus
- Haplochromis saxicola
- Haplochromis sp. nov. ‘Amboseli’
- Haplochromis sp. nov. ‘ruby’
- Haplochromis petronius
- Haplochromis spekii
- Haplochromis venator
- Haplochromis sauvagei
- Haplochromis oregosoma
- Hardnose Shark
- Harpagochromis sp. nov. ‘frogmouth’
- Hawaiian Grouper
- Hedgehog Seahorse
- Hemigrammocapoeta kemali
- Hemigrammocapoeta nana
- Hemimyzon taitungensis
- Herault Sculpin
- Hidden Angel Shark
- Highfin Coral Grouper
- Highland Splitfin
- Hogfish
- Honey Blue-eye
- Hong Kong Grouper
- Hooded Carpet Shark
- Horaglanis krishnai
- Humpback Chub
- Humpback Smoothhound
- Hyaline Fish
- Iberochondrostoma lemmingii
- Iberochondrostoma oretanum
- Iberochondrostoma lusitanicus
- Iberochondrostoma almacai
- Iberocypris alburnoides
- Iberocypris palaciosi
- Incomati Suckermouth
- Indonesian Shovelnose Ray
- Iodotropheus declivitas
- Iodotropheus stuartgranti
- Iodotropheus sprengerae
- Iraq Blind Barb
- Italian Bleak
- Itasenpara Bitterling
- Izu Stingray
- Japanese Devilray
- Japanese Huchen
- Java Stingaree
- Juil Ciego
- Jullien’s Golden Carp
- June Sucker
- Kalombo Suckermouth
- Kaluga
- Kanawha Minnow
- Kandar
- Kapala Stingaree
- Katapa-tapa
- Katolo
- Kelp Grouper
- Kerch Black Sea Shad
- Kezenoi-am Trout
- Kibiti Lampeye
- King’s Bullhead
- Kite Ray
- Kiyi
- Kneria ruaha
- Kneria sp. nov. ‘South Africa’
- Kneria uluguru
- Knifetooth Sawfish
- Knipowitschia radovici
- Knipowitschia milleri
- Knipowitschia cameliae
- Knipowitschia sp. nov. ‘Visovac’
- Knipowitschia croatica
- Knipowitschia thessala
- Knipowitschia mermere
- Knipowitschia punctatissima
- Knipowitschia ephesi
- Konye
- Kululu
- Kunming Nase
- Kunming Snout Trout
- Kunming-lake Catfish
- Kutubu Hardyhead
- Kutubu Tandan
- La Palma Pupfish
- La Plata Skate
- Labeo lankae
- Labeo sp. nov. ‘Baomo’
- Labeo sp. nov. ‘Mzima’
- Labeo trigliceps
- Labidochromis strigatus
- Labidochromis zebroides
- Labidochromis lividus
- Labidochromis mylodon
- Labidochromis ianthinus
- Labidochromis freibergi
- Labidochromis flavigulis
- Labidochromis heterodon
- Labidochromis pallidus
- Labidochromis mbenjii
- Labidochromis gigas
- Labidochromis chisumluae
- Lake Eacham Rainbowfish
- Lake Kurumoi Rainbowfish
- Lake Kutubu Rainbowfish
- Lake Magadi Tilapia
- Lake Rukwa Sardine
- Lake Rukwa Suckermouth
- Lake Victoria Deepwater Catfish
- Lake Wanam Rainbowfish
- Lamprologus kungweensis
- Laotian Shad
- Large-eyed Rabbitfish
- Largemouth Yellowfish
- Largescale Pupfish
- Largetooth Sawfish
- Lavaret
- Least Chub
- Leka Keppe
- Lentipes whittenorum
- Leon Springs Pupfish
- Leopard Darter
- Leopard Shark
- Lepidiolamprologus attenuatus
- Leptoglanis wamiensis
- Lethrinops microdon
- Lethrinops macracanthus
- Lethrinops stridae
- Lethrinops micrentodon
- Lethrinops oculatus
- Lethrinops macrophthalmus
- Lindog
- Lined Seahorse
- Lined Silverside
- Liobagrus nigricauda
- Liosaccus pachygaster
- Liparia
- Lipochromis sp. nov. ‘backflash cryptodon’
- Lipochromis sp. nov. ‘small obesoid’
- Lipochromis sp. nov. ‘parvidens-like’
- Lipochromis sp. nov. ‘black cryptodon’
- Lithochromis rubripinnis
- Lithochromis xanthopteryx
- Lithochromis rufus
- Little Colorado Spinedace
- Liver-oil Shark
- Lizard Catshark
- Loach Minnow
- Long-nosed Skate
- Longfin Mako
- Longfin Svetovidov’s Char
- Longheaded Eagle Ray
- Longnose Eagle Ray
- Longtail Butterfly Ray
- Longtail Suckermouth
- Lost River Sucker
- Lowveld Largemouth
- Lucifuga subterranea
- Lucifuga simile
- Lucifuga teresinarum
- Lucifuga spelaeotes
- Luciobarbus brachycephalus
- Luciobarbus capito
- Luciobarbus comizo
- Luciobarbus graecus
- Luciobarbus guiraonis
- Luciobarbus microcephalus
- Luciobarbus steindachneri
- Macropleurodus bicolor
- Madagascar Kob
- Madagascar Skate
- Malabar Grouper
- Maloti Minnow
- Maltese Ray
- Manalak
- Mandarin Shark
- Mandibularca resinus
- Mandras Shemaya
- Maraene
- Marbled Freshwater Stingray
- Marcusenius victoriae
- Marcusenius sp. nov. ‘Malindi’
- Marcusenius sp. nov. ‘Turkwell’
- Marley’s Butterflyfish
- Martenstyn’s Barb
- Maryland Darter
- Masked Hamlet
- Matalote Cahita
- Matalote Conchos
- Matalote Del Bavispe
- Matalote Opata
- Maugean Skate
- Maya Pupfish
- Maylandia heteropicta
- Maylandia hajomaylandi
- Maylandia greshakei
- Maylandia estherae
- Maylandia emmiltos
- Maylandia cyneusmarginata
- Maylandia chrysomallos
- Maylandia callainos
- Maylandia aurora
- Maylandia lombardoi
- Maylandia mbenjii
- Maylandia xanstomachus
- Maylandia sandaracinos
- Maylandia benetos
- Maylandia thapsinogen
- Maylandia pyrsonotos
- Maylandia pursa
- Maylandia phaeos
- Maylandia melabranchion
- Mbipia lutea
- Mbozi Suckermouth
- Mediterranean Trout
- Mekong Freshwater Stingray
- Melanochromis joanjohnsonae
- Melanochromis dialeptos
- Melanochromis chipokae
- Melanochromis perileucos
- Melanochromis heterochromis
- Melanochromis interruptus
- Melanochromis xanthodigma
- Melanochromis elastodema
- Melanochromis johannii
- Melanochromis lepidiadaptes
- Melanochromis loriae
- Melanochromis cyaneorhabdos
- Melanochromis mellitus
- Melanochromis baliodigma
- Mexclapique
- Mexican Blindcat
- Mexican Darter
- Mexican Golden Trout
- Minute Pearlfish
- Miyako Tango
- Moapa Dace
- Modoc Sucker
- Mohave Tui Chub
- Mojarra
- Mojarra
- Mojarra
- Mojarra
- Mojarra
- Molly Del Tamesi
- Molly Del Teapa
- Mongo
- Monterrey Platyfish
- Monterrey Spanish Mackerel
- Mottled Eagle Ray
- Mountain Blackside Dace
- Mugilogobius latifrons
- Mugilogobius adeia
- Multispine Skate
- Munchkin Skate
- Munk’s Devil Ray
- Murray Cod
- Murray Hardyhead
- Mutton Snapper
- Myaka Myaka
- Naked Characin
- Nanogovios
- Narcine leoparda
- Narrownose Smoothhound
- Narrowsnout Sawfish
- Nassau Grouper
- Needle Dogfish
- Nekogigi Catfish
- Nemacheilus starostini
- Nemacheilus troglocataractus
- Nemacheilus dori
- Nemacheilus sp. nov.
- Nemacheilus pantheroides
- Nemacheilus jordanicus
- Neochromis simotes
- Neochromis greenwoodi
- Neochromis gigas
- Neolamprologus christyi
- Neolamprologus schreyeni
- Neolissochilus theinemanni
- Nevada Pupfish
- New Caledonia Catshark
- New Guinea River Shark
- Niangua Darter
- Niger Stingray
- Night Shark
- Nomorhamphus towoeti
- Non-parasitic Lamprey
- Northern Cavefish
- Northern Draughtboard Shark
- Northern Guitarfish
- Nothobranchius patrizii
- Nothobranchius albimarginatus
- Nothobranchius aff. taeniopygus
- Nothobranchius rubripinnis
- Nothobranchius sp. nov. ‘Lake Victoria’
- Nothobranchius steinforti
- Nothobranchius willerti
- Nothobranchius annectens
- Nothobranchius lourensi
- Nothobranchius bojiensis
- Nothobranchius elongatus
- Nothobranchius luekei
- Nothobranchius flammicomantis
- Nothobranchius foerschi
- Nothobranchius geminus
- Nothobranchius interruptus
- Nothobranchius kilomberoensis
- Nothobranchius korthausae
- Nsess
- Oceanic Whitetip Shark
- Ogilby’s Ghostshark
- Ohrid Gudgeon
- Ohrid Spirlin
- Okaloosa Darter
- Oktedi Rainbowfish
- Olive Grouper
- Oncorhynchus formosanus
- One-finned Shark
- Onefin Skate
- Onychostoma alticorpus
- Opal Goodeid
- Opalescent Pearlfish
- Opsaridium microlepis
- Opsaridium microcephalum
- Orange-fringed River Bream
- Orangefin Madtom
- Oregon Chub
- Oreochromis variabilis
- Oreochromis ndalalani
- Oreochromis andersonii
- Oreochromis karomo
- Oreochromis latilabris
- Oreochromis macrochir
- Oreochromis jipe
- Oreochromis hunteri
- Oreochromis esculentus
- Oreochromis mossambicus
- Oreochromis rukwaensis
- Oreochromis alcalicus
- Oreochromis amphimelas
- Oreochromis chungruruensis
- Oreochromis squamipinnis
- Oreochromis karongae
- Oreochromis pangani
- Oreochromis mortimeri
- Oreochromis lidole
- Oreonectes anophthalmus
- Orestias chungarensis
- Ornate Eagle Ray
- Orthochromis kasuluensis
- Orthochromis mosoensis
- Orthochromis rubrolabialis
- Orthochromis uvinzae
- Orthochromis luichensis
- Orthochromis malagaraziensis
- Orthochromis rugufuensis
- Orthochromis mazimeroensis
- Orthrias tschaiyssuensis
- Oryzias marmoratus
- Oryzias profundicola
- Oryzias celebensis
- Oryzias nigrimas
- Oryzias orthognathus
- Oryzias matanensis
- Ospatulus palaemophagus
- Otopharynx lithobates
- Ouachita Madtom
- Ouachita Mountain Shiner
- Owens Pupfish
- Owens Tui Chub
- Oxleyan Pygmy Perch
- Oxynoemacheilus pindus
- Ozark Cavefish
- Pachypanchax sp. nov. ‘Varatraza’
- Pachypanchax sp. nov. ‘Anjingo’
- Pachypanchax sp. nov. ‘Talio’
- Pachypanchax sp. nov. ‘Betsiboka’
- Pachypanchax sakaramyi
- Pacific Seahorse
- Pahranagat Roundtail Chub
- Pahrump Poolfish
- Pait
- Palata
- Pale Dottyback
- Pale-edged Stingray
- Paleback Darter
- Palezone Shiner
- Pallid Sturgeon
- Pantanodon sp. nov. ‘Manombo’
- Papuan Epaulette Shark
- Parachondrostoma toxostoma
- Parachondrostoma arrigonis
- Parachondrostoma turiense
- Parakneria tanzaniae
- Paralabidochromis victoriae
- Paratherina cyanea
- Paratherina labiosa
- Paratherina striata
- Paratherina wolterecki
- Paratilapia sp. nov. ‘Vevembe’
- Paratilapia polleni
- Paratilapia typus
- Paretroplus polyactis
- Paretroplus maculatus
- Paretroplus sp. nov. ‘Ventitry’
- Paretroplus nourissati
- Paretroplus maromandia
- Paretroplus kieneri
- Paretroplus sp. nov. ‘Dridri mena’
- Paretroplus menarambo
- Paretroplus sp. nov. ‘Sofia’
- Paretroplus dambabe
- Parosphromenus harveyi
- Patagonian Skate
- Pecos Gambusia
- Pecos River Pupfish
- Pedder Galaxias
- Pelagos Trout
- Pelasgus epiroticus
- Pelasgus marathonicus
- Pelasgus thesproticus
- Pelasgus laconicus
- Pelasgus prespensis
- Percarina demidoffi
- Persian Sturgeon
- Petrotilapia nigra
- Petrotilapia chrysos
- Pfarrit
- Phallostethus dunckeri
- Phoxinellus dalmaticus
- Phoxinellus alepidotus
- Phoxinellus pseudalepidotus
- Phoxinellus anatolicus
- Pike Asp
- Pincushion Ray
- Pindu
- Plain terapon
- Platy Cuatro Cienegas
- Platy De Muzquiz
- Platytaeniodus degeni
- Plectranthias chungchowensis
- Plunket’s Dogfish
- Poey’s Grouper
- Polkadot Cod
- Pollan
- Pondicherry Shark
- Pontian Shemaya
- Popta’s Buntingi
- Porbeagle
- Porcupine Ray
- Poropuntius tawarensis
- Portuguese Dogfish
- Poso Bungu
- Potosi Pupfish
- Powan
- Prespa Spirlin
- Prickly Shark
- Prognathochromis sp. nov. ‘long snout’
- Proserpine Shiner
- Protemblemaria punctata
- Protocobitis typhlops
- Protomelas virgatus
- Pseudochondrostoma willkommii
- Pseudochondrostoma duriense
- Pseudophoxinus syriacus
- Pseudophoxinus fahirae
- Pseudophoxinus kervillei
- Pseudophoxinus egridiri
- Pseudophoxinus crassus
- Pseudophoxinus zeregi
- Pseudophoxinus battalgili
- Pseudophoxinus anatolicus
- Pseudophoxinus drusensis
- Pseudotropheus modestus
- Pseudotropheus purpuratus
- Pseudotropheus saulosi
- Pseudotropheus tursiops
- Pseudotropheus elongatus
- Pseudotropheus longior
- Pseudotropheus galanos
- Pseudotropheus flavus
- Pseudotropheus demasoni
- Pseudotropheus cyaneus
- Pseudotropheus ater
- Ptychochromis inornatus
- Ptychochromis sp. nov. ‘Green Garaka’
- Ptychochromis sp. nov. ‘Joba mena’
- Ptychochromis sp. nov. ‘Garaka’
- Ptychochromoides betsileanus
- Ptychochromoides vondrozo
- Ptychochromoides katria
- Ptyochromis sp. nov. ‘Rusinga oral sheller’
- Ptyochromis sp. nov. ‘rainbow sheller’
- Pundamilia igneopinis
- Pundamilia nyerere
- Pundamilia macrocephala
- Pungu
- Puntius hemictenus
- Puntius herrei
- Puntius manguaoensis
- Puntius speleops
- Purple Eagle Ray
- Pygmy Devilray
- Pygmy Madtom
- Pygmy Sculpin
- Pyxichromis orthostoma
- Queen Triggerfish
- Quietschbukers
- Rabbitfish
- Railroad Valley Springfish
- Rainbow Goodeid
- Rainbow Parrotfish
- Rasbora tawarensis
- Rasbora baliensis
- Rasbora wilpita
- Razorback Sucker
- Red Grouper
- Red Porgy
- Red Rainbowfish
- Red Stingray
- Red-finned Blue-eye
- Red-tailed Sharkminnow
- Redfish
- Reinanke
- Relict Dace
- Relict Darter
- Resowska Shemaja
- Resplendent Pygmy Angelfish
- Reticulated Toadfish
- Rhabdalestes leleupi
- Rhamdia zongolicensis
- Rheocles wrightae
- Rheocles alaotrensis
- Rheocles derhami
- Rheocles vatosoa
- Rhinobatos jimbaranensis
- Riedling
- Ringstraked Guitarfish
- Rio Grande Darter
- Rio Grande Silvery Minnow
- Rio Skate
- River Pipefish
- Roanoke Bass
- Roanoke Logperch
- Romanian Loach
- Romanogobio benacensis
- Rough Sculpin
- Roughnose Wedgefish
- Roughskin Skate
- Roving Coralgrouper
- Rovuma Topminnow
- Ruaha Lampeye
- Rubberlip Hap
- Russian Sturgeon
- Rutilus ylikiensis
- Rutilus rubilio
- Rutilus prespensis
- Rutilus panosi
- Rutilus meidingeri
- Saccogaster melanomycter
- Sacramento Splittail
- Saddled Galaxias
- Saint Lucia Mullet
- Sakhalin Sturgeon
- Salaria economidisi
- Salgir Gudgeon
- Salmo ohridanus
- Salmo peristericus
- Salvelinus willoughbii
- Salvelinus obtusus
- Salvelinus lonsdalii
- Salvelinus grayi
- Salvelinus japonicus
- Salvelinus killinensis
- Salvelinus gracillimus
- Salvelinus colii
- Salvelinus fimbriatus
- Salvelinus evasus
- Salvelinus mallochi
- Salvelinus maxillaris
- Salvelinus struanensis
- Salvelinus perisii
- Salvelinus sp. nov. ‘Fjellfrosvatn’
- Salvelinus youngeri
- Salvelinus confluentus
- San Marcos Gambusia
- Sand Sturgeon
- Sandfelchen
- Santa Ana Sucker
- Santa Catarina Sabrefin
- Sarasin’s Goby
- Sarasins Minnow
- Sardinilla Cuatro Cienegas
- Sardinita Bocagrande
- Sardinita De Rio Verde
- Sardinita De Santa Maria
- Sardinita De Tepelmene
- Sardinita Del Pilon
- Sardinita Quijarrona
- Satsukimasu Salmon
- Sawback Angelshark
- Sawtail Grouper
- Scardinius acarnanicus
- Scardinius scardafa
- Scardinius racovitzai
- Scardinius graecus
- Scardinius dergle
- Schelly
- Schistura sijuensis
- Schistura oedipus
- Schistura jarutanini
- Schizothorax lepidothorax
- Schwebrenke
- Scioto Madtom
- Seabass
- Sentani Rainbowfish
- Sepia Stingray
- Sharpfin Houndshark
- Sharpnose Guitarfish
- Sharpnose Stingray
- Sharpsnout Stingray
- Sharptooth Lemon Shark
- Shortjaw Cisco
- Shortjawed Kokopu
- Shortlip Electric Ray
- Shortnose Cisco
- Shortnose Guitarfish
- Shortnose Sturgeon
- Shortnose Sucker
- Shortspine Thornyhead
- Shorttail Nurse Shark
- Shoshone Sculpin
- Shovelmouth
- Siamese Bat Catfish
- Sibayi Goby
- Siberian Sturgeon
- Sicyopus axilimentus
- Silver Perch
- Silver Shark
- Silvery White Fish
- Simochromis margaretae
- Simochromis marginatus
- Sinogastromyzon puliensis
- Sirang
- Siraz Baligi
- Siraz Baliginin Capoeta
- Sixgill Sawshark
- Skadar Gudgeon
- Skadar Shad
- Skulpin
- Slackwater Darter
- Slender Chub
- Slender Hammerhead
- Slender Redfin
- Small Amu-dar Shovelnose Sturgeon
- Small Eye Golden-line Fish
- Smalleye Shiner
- Smallscale Redfin
- Smallscaled Grouper
- Smalltooth Sawfish
- Smoky Madtom
- Smooth Skate
- Smoothback Angel Shark
- Smoothnose Wedgefish
- Smoothtooth Blacktip
- Snail Darter
- Sockeye Salmon
- Solo Goodeido
- Somalian Blind Barb
- Somalian Cavefish
- Sonaghen
- Songatana
- South Brazilian Skate
- Southern Bluefin Tuna
- Southern Cavefish
- Southern Sawtail Catshark
- Speartooth Shark
- Speckled Dace
- Speckled Smoothhound
- Sphaerophysa dianchiensis
- Spikedace
- Spiny Angel Shark
- Spinycheek Grouper
- Splendid Pearlfish
- Splendid Toadfish
- Spotback Skate
- Spotfin Gambusia
- Spotted Eagle Ray
- Spotted Handfish
- Spotted Houndshark
- Spotted Loach
- Spotted Shovelnose Ray
- Spotted Wobbegong
- Springfish
- Squalius zrmanjae
- Squalius sp. nov. ‘Aoos’
- Squalius illyricus
- Squalius valentinus
- Squalius aradensis
- Squalius sp. nov. ‘Evia’
- Squalius svallize
- Squalius tenellus
- Squalius keadicus
- Squalius anatolicus
- Squalius lucumonis
- Squalius malacitanus
- Squalius pyrenaicus
- Squalius moreoticus
- Squalius torgalensis
- Squalius microlepis
- St Helena Dragonet
- St. Helena Chromis
- Star Sturgeon
- Steelhead
- Stegastes sanctipauli
- Stegastes sanctaehelenae
- Sterlet
- Stiphodon surrufus
- Strandzha Minnow
- Striated Darter
- Striped Dogfish
- Striped Goodeid
- Striped Mogurnda
- Stupidogobius flavipinnis
- Sturgeon Chub
- Stygicola dentata
- Sulawesi Coelacanth
- Sundoreonectes tiomanensis
- Surge Grouper
- Swan Galaxias
- Synodontis victoriae
- Synodontis macrops
- Synodontis ruandae
- Syr-darya Shovelnose Sturgeon
- Taiwan Guitarfish
- Taiwan Gulper Shark
- Tamaulipan Blindcat
- Tana Labeo
- Tanganyika Clown
- Tanganyika Lates
- Tarndale Bully
- Tasselled Wobbegong
- Tawny Nurse Shark
- Tayrona Blenny
- Telestes polylepis
- Telestes fontinalis
- Telestes turskyi
- Telestes beoticus
- Telestes metohiensis
- Telestes croaticus
- Telmatherina prognatha
- Telmatherina obscura
- Telmatherina celebensis
- Telmatherina opudi
- Telmatherina antoniae
- Telmatherina abendanoni
- Telmatherina sarasinorum
- Telmatherina wahjui
- Telmatherina ladigesi
- Tepehuan Shiner
- Teramulus waterloti
- Thailand Giant Catfish
- Thalassoma ascensionis
- Thessaly Gudgeon
- Thicklip Pupfish
- Three-banded Butterflyfish
- Tidewater Goby
- Tiger Cod
- Tiger Tail Seahorse
- Tilapia kottae
- Tilapia guinasana
- Tilapia deckerti
- Tilapia flava
- Tilapia gutturosa
- Tilapia bythobathes
- Tilapia bemini
- Tilapia bakossiorum
- Tilapia imbriferna
- Tilapia thysi
- Tilapia spongotroktis
- Tilapia snyderae
- Tilapia sp. nov. ‘yellow-green’
- Tilapia sp. nov. ‘jewel’
- Tilapia sp. nov. ‘little black’
- Timavo Sculpin
- Tiro
- Tollo
- Tominanga aurea
- Tominanga sanguicauda
- Tondanichthys kottelati
- Toothless Blindcat
- Topeka Shiner
- Tor yunnanensis
- Totoaba Seatrout
- Tradou Redfin
- Tras
- Trichomycterus chungarensis
- Triplophysa xiangxensis
- Trispot Darter
- Tristramella sacra
- Tropheops microstoma
- Tropheops gracilior
- Tropheops tropheops
- Tropheus polli
- Tropheus duboisi
- Tropidophoxinellus spartiaticus
- Trout Cod
- Tumba
- Tuscumbia Darter
- Typhleotris madgascarensis
- Typhleotris pauliani
- Uegitglanis zammaranoi
- Unarmored Threespine Stickleback
- Unga
- Usangu Lampeye
- Valencia Toothcarp
- Variagated Pygmy Perch
- Varicorhinus ruandae
- Varicorhinus ruwenzori
- Varicorhinus leleupanus
- Varicorhinus nelspruitensis
- Varicorhinus platystoma
- Variegated Electric Ray
- Variegated Mogurnda
- Varna Gudgeon
- Varsikloja
- Vendace
- Venezuela Round Stingray
- Venezuela Skate
- Venezuelan Herring
- Vermilion Darter
- Victoria Robber
- Virgin River Chub
- Vistonis Shemaja
- Volga Shad
- Volvi Bleak
- Waccamaw Killifish
- Waccamaw Silverside
- Warner Sucker
- Watercress Darter
- Waterfall Climbing Cave Fish
- Whale Shark
- White Grouper
- White River Spinedace
- White Sands Pupfish
- White Sturgeon
- White-edge Freshwater Whipray
- White-spotted Dogfish
- White-spotted Guitarfish
- Whitecheek Shark
- Whitedotted Skate
- Whitefin Tope Shark
- Whitelined Toadfish
- Whitespotted Toadfish
- Whitish Catshark
- Widemouth Blindcat
- Widenose Guitarfish
- Wild Common Carp
- Wood River Sculpin
- Woundfin
- Xenotilapia burtoni
- Xyrichtys virens
- Xystichromis sp. nov. ‘Kyoga flameback’
- Yalartza
- Yamur Lake Grunter
- Yaqui Chub
- Yaqui Sucker
- Yarra Pygmy Perch
- Yellow-crowned Butterflyfish
- Yellowback Stingaree
- Yellowcheek Darter
- Yellowfin Grouper
- Yellowfin Hind
- Yellowfin Madtom
- Yellowtail Flounder
- Yssichromis sp. nov. ‘argens’
- Yunnanilus macrogaster
- Yunnanilus niger
- Yunnanilus discoloris
- Yunnanilus nigromaculatus
- Zanzibar Guitarfish
- Zingel asper
- Zonetail Butterfly Ray
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