As of July 2017, the

International Union for Conservation of Nature The International Union for Conservation of Nature (IUCN; officially International Union for Conservation of Nature and Natural Resources) is an international organization working in the field of nature conservation and sustainable use of nat ...

(IUCN) lists 1,000 critically endangered

fish Fish are aquatic, craniate, gill-bearing animals that lack limbs with digits. Included in this definition are the living hagfish, lampreys, and cartilaginous and bony fish as well as various extinct related groups. Approximately 95% of ...

species, including 87 which are tagged as ''possibly extinct''. 3.0% of all evaluated fish species are listed as critically endangered. The IUCN also lists four fish subspecies as critically endangered. Of the subpopulations of fish evaluated by the IUCN, 20 species subpopulations and one subspecies subpopulation have been assessed as critically endangered. Additionally 3191 fish species (21% of those evaluated) are listed as '' data deficient'', meaning there is insufficient information for a full assessment of conservation status. As these species typically have small distributions and/or populations, they are intrinsically likely to be threatened, according to the IUCN. While the category of ''data deficient'' indicates that no assessment of extinction risk has been made for the taxa, the IUCN notes that it may be appropriate to give them "the same degree of attention as threatened taxa, at least until their status can be assessed." This is a complete list of critically endangered fish species and subspecies evaluated by the IUCN. Species considered possibly extinct by the IUCN are marked as such. Species and subspecies which have critically endangered subpopulations (or stocks) are indicated.

Cartilaginous fishes

Includes sharks, rays, skates, and shovelnose rays. The majority of the order

Rhinopristiformes Rhinopristiformes is an order of rays, cartilaginous fishes related to sharks, containing shovelnose rays and allied groups. Families * Family Glaucostegidae (giant guitarfishes) * Family Pristidae (sawfishes) * Family Rhinidae (wedgefishes) * ...

, which includes sawfish, guitarfish, wedgefish, and other shovelnose rays, is considered critically endangered, with 28 of its 64 evaluated species considered critically endangered by the IUCN.

Carchariniformes

* Pondicherry shark ''(Carcharhinus hemiodon)'' *

Ganges shark The Ganges shark (''Glyphis gangeticus'') is a critically endangered species of requiem shark found in the Ganges River (Padma River) and the Brahmaputra River of Bangladesh and India. It is often confused with the more common bull shark (''Car ...

''(Glyphus gangeticus)'' * Scalloped bonnethead ''(Sphyrna corona)'' * Smalleye hammerhead ''(Sphyrna tudes)'' * Scoophead ''(Sphyrna media)'' *

Great hammerhead The great hammerhead (''Sphyrna mokarran'') or great hammerhead shark is the largest species of hammerhead shark, belonging to the family Sphyrnidae, attaining an average length of and reaching a maximum length of . It is found in tropical and w ...

''(Sphyrna mokarran)'' *

Scalloped hammerhead The scalloped hammerhead (''Sphyrna lewini'') is a species of hammerhead shark in the family Sphyrnidae. It was originally known as ''Zygaena lewini''. The Greek word ''sphyrna'' translates into "hammer" in English, referring to the shape of thi ...

''(Sphyrna lewini)'' * Lost shark ''(Carcharhinus obsoletus)'' *

Borneo shark The Borneo shark (''Carcharhinus borneensis'') is a species of requiem shark, and part of the family Carcharhinidae. Extremely rare, it is known only from inshore waters around Mukah in northwestern Borneo, though it may once have been more wi ...

''(Carcharhinus borneensis)'' * Tope ''(Galeorhinus galeus)'' *

Whitefin topeshark The whitefin topeshark (''Hemitriakis leucoperiptera'') is a houndshark of the family Triakidae, found only in the tropical waters of the Philippines between latitudes 20° N and 5° N. They inhabit the coastal areas. They can grow up to a len ...

''(Hemitriakis leucoperiptera)'' * Daggernose shark ''(Isogomphon oxyrhynchus)'' * Indian swellshark ''(Cephaloscyllium silasi)'' *

Reticulated swellshark The reticulated swellshark (''Cephaloscyllium fasciatum'') is a catshark of the family Scyliorhinidae. The Reticulated swellshark is found in the western Pacific Ocean between latitude In geography, latitude is a coordinate that specifies ...

''(Cephaloscyllium fasciatum)'' *

Sarawak pygmy swellshark The Sarawak pygmy swellshark (''Cephaloscyllium sarawakensis'') is a species of catshark, belonging to the family Scyliorhinidae. It is found in the benthic zone near the edge of the Pacific continental shelf, at depths of 118–165 m. ...

''(Cephaloscyllium sarawakensis)'' *

Whitefin swellshark The whitefin swellshark (''Cephaloscyllium albipinnum'') is a little-known species of catshark, belonging to the family (biology), family Catshark, Scyliorhinidae, Endemism, endemic to southeastern Australia. It is found down, on the outer cont ...

''(Cephaloscyllium albipinnum)'' * Smalltail shark ''(Carcharhinus porosus)'' * Pacific smalltail shark ''(Carcharhinus cerdale)'' *

Oceanic whitetip shark The oceanic whitetip shark (''Carcharhinus longimanus''), also known as shipwreck shark, Brown Milbert's sand bar shark, brown shark, lesser white shark, nigano shark, oceanic white-tipped whaler, and silvertip shark, is a large pelagic requiem ...

''(Carcharhinus longimanus)'' * Spotted houndshark ''(Triakis maculata)'' * Speckled smoothhound ''(Mustelus mento)'' * Narrownose smoothhound ''(Mustelus schmitti)'' * Striped smoothhound ''(Mustelus fasciatus)'' * Humpback smoothhound ''(Mustelus whitneyi)''

Lamniformes

Sand tiger shark The sand tiger shark (''Carcharias taurus''), gray nurse shark, spotted ragged-tooth shark or blue-nurse sand tiger, is a species of shark that inhabits subtropical and temperate waters worldwide. It inhabits the continental shelf, from sandy sho ...

''(Carcharius taurus)''

Orectolobiformes

* Shorttail nurse shark ''(Pseudoginglymostoma brevicaudatum)''

Squaliformes

* Dwarf gulper shark ''(Centrophorus atromarginatus)''

Squatiniformes

Angelshark The angelsharks are a group of sharks in the genus ''Squatina'' of the family Squatinidae. They commonly inhabit sandy seabeds close to in depth. Many species are now classified as critically endangered by the International Union for Conservat ...

''(Squatina squatina)'' * Smoothback angelshark ''(Squatina oculata)'' * Sawback angelshark ''(Squatina aculeata)'' * Hidden angelshark ''(Squatina occulta)'' * Japanese angelshark ''(Squatina japonica)'' * Indonesian angelshark ''(Squatina legnota)'' * Argentine angelshark ''(Squatina argentina)'' * Chilean angelshark ''(Squatina armata)''

Rajiformes

* Common blue skate *

Longnose skate Longnose skate can refer to several species of rays (fish): * '' Beringraja rhina'', from the northeast Pacific * '' Dentiraja confusa'', found off southeastern Australia * '' Dipturus oxyrinchus'', from the northeast Atlantic and Mediterranean ...

* Bignose fanskate * Flapper skate * Menni's skate * Korean skate * Maltese skate * Spotback skate

Myliobatiformes

* Wingfin stingray * Smalltooth stingray * Colares stingray * Smooth stingray * Pakistan whipray * Shorttail whipray * Thorny whipray * Smalleye round ray * Reticulate round ray * Tentacled butterfly ray * Starrynose cowtail ray * Lusitanian cownose ray * Java stingaree * Common eagle ray * Duckbill eagle ray * Shortnose eagle ray

Rhinopristiformes

Largetooth sawfish The largetooth sawfish (''Pristis pristis'', syn. ''P. microdon'' and ''P. perotteti'') is a species of sawfish, family Pristidae. It is found worldwide in tropical and subtropical coastal regions, but also enters freshwater. It has declined dra ...

''(Pristis pristis)'' *

Smalltooth sawfish The smalltooth sawfish (''Pristis pectinata'') is a species of sawfish in the family Pristidae. It is found in shallow tropical and subtropical waters in coastal and estuarine parts of the Atlantic. Reports from elsewhere are now believed to be m ...

''(Pristis pectinata)'' * Green sawfish ''(Pristis zijsron)'' * Giant guitarfish ''(Glaucostegus typus)'' * Halavi guitarfish ''(Glaucostegus halavi)'' *

Bowmouth guitarfish ''Rhina ancylostoma'', the bowmouth guitarfish, shark ray or mud skate, is a species of ray and a member of the family Rhinidae. Its evolutionary affinities are not fully resolved, though it may be related to true guitarfishes and skates. Th ...

''(Rhina ancylostoma)'' * Smoothback guitarfish ''(Rhinobatus lionotus)'' * Spineback guitarfish ''(Rhinobatos irvinei)'' * Sharpnose guitarfish ''(Glaucostegus granulatus)'' * Stripenose guitarfish ''(Acroteriobatus variegatus)'' * Clubnose guitarfish ''(Glaucostegus thouin)'' * Widenose guitarfish ''(Glaucostegus obtusus)'' * Whitespotted guitarfish ''(Rhynchobatus djiddensis)'' * Jimbaran guitarfish ''(Rhinobatos jimbaraensis)'' * Brown guitarfish ''(Rhinobatos schlegeii)'' * Blackchin guitarfish ''(Glaucostegus cemiculus)'' * Bengal guitarfish ''(Rhinobatus annandalei)'' * Brazilian guitarfish ''(Pseudobatus horkelii)'' * Common guitarfish ''(Rhinobatos rhinobatos)'' * Philippine guitarfish ''(Rhinobatos whitei)'' * Broadnose wedgefish ''(Rhynchobatus springeri)'' * Bottlenose wedgefish ''(Rhynchobatus australiae)'' * Smoothnose wedgefish ''(Rhynchobatus laevis)'' * African wedgefish ''(Rhynchobatus luebberti)'' * Taiwanese wedgefish ''(Rhynchobatus immaculatus)'' * Clown wedgefish ''(Rhynchobatus cooki)'' * Whitespotted wedgefish ''(Rhinobatus albomaculatus)'' * False shark ray ''(Rhynchorhina mauritaniensis)''

Torpediniformes

* Red Sea torpedo ''(Torpedo suessii)'' * Argentine torpedo ''(Tetronarce puelcha)'' Subpopulations

Ray-finned fishes Actinopterygii (; ), members of which are known as ray-finned fishes, is a class of bony fish. They comprise over 50% of living vertebrate species. The ray-finned fishes are so called because their fins are webs of skin supported by bony or hor ...

There are 431 species, four subspecies, four subpopulations of species, and one subpopulations of subspecies of ray-finned fish assessed as critically endangered.

Acipenseriformes Acipenseriformes is an order of basal ray-finned fishes that includes living and fossil sturgeons and paddlefishes (Acipenseroidei), as well as the extinct families Chondrosteidae and Peipiaosteidae. They are the second earliest div ...

Acipenseriformes includes sturgeons and paddlefishes. There are 17 species and one subpopulation in the order Acipenseriformes assessed as critically endangered.

Sturgeons Sturgeon is the common name for the 27 species of fish belonging to the family Acipenseridae. The earliest sturgeon fossils date to the Late Cretaceous, and are descended from other, earlier acipenseriform fish, which date back to the Early ...

Species Subpopulations *

White sturgeon White sturgeon (''Acipenser transmontanus'') is a species of sturgeon in the family Acipenseridae of the order Acipenseriformes. They are an anadromous fish species ranging in the Eastern Pacific; from the Gulf of Alaska to Monterey, Californ ...

''(Acipenser transmontanus)'' (2 subpopulations)

Salmoniformes Salmonidae is a family of ray-finned fish that constitutes the only currently extant family in the order Salmoniformes . It includes salmon (both Atlantic and Pacific species), trout (both ocean-going and landlocked), chars, freshwater whitefis ...

Species Subpopulations of species * Sockeye salmon ''(Oncorhynchus nerka)'' (4 subpopulations) Subpopulations of subspecies * Aral sea trout ''(Salmo trutta aralensis)'' (1 subpopulation)

Silversides

Toothcarps

Species Subspecies *'' Epiplatys fasciolatus josianae'' * Ejagham killi ''(Fundulopanchax gardneri lacustris)''

Cypriniformes Cypriniformes is an order of ray-finned fish, including the carps, minnows, loaches, and relatives. Cypriniformes is an Order within the Superorder Ostariophysi consisting of " Carp-like" Ostariophysins. This order contains 11-12 famili ...

Cypriniformes includes carps, minnows, loaches and relatives. There are 145 species, one subspecies, and one subpopulation in the order Cypriniformes assessed as critically endangered.

Hillstream loaches

True loaches

Cyprinids Cyprinidae is a family of freshwater fish commonly called the carp or minnow family. It includes the carps, the true minnows, and relatives like the barbs and barbels. Cyprinidae is the largest and most diverse fish family and the largest vert ...

Species Subspecies *'' Rhodeus ocellatus smithii'' Subpopulations * Common carp ''(Cyprinus carpio)'' (1 subpopulation)

Psilorhynchids

*'' Psilorhynchus tenura''

Suckers

June sucker The June sucker (''Chasmistes liorus'') is an endangered species of fish endemic to Utah Lake and the Provo River in the U.S. state of Utah. It is a gray or brownish fish with a paler belly, growing up to about . It lives alongside the Utah sucke ...

''(Chasmistes liorus)'' *

Razorback sucker The razorback sucker (''Xyrauchen texanus'') is a suckerfish found in rivers and lakes in the southwestern United States. It can grow to in length and is recognisable by the keel between its head and dorsal fin. It used to inhabit much of the C ...

''(Xyrauchen texanus)''

Osmeriformes The Osmeriformes are an order of ray-finned fish that includes the true or freshwater smelts and allies, such as the galaxiids and noodlefishes; they are also collectively called osmeriforms. They belong to the teleost superorder Protacanthopt ...

Catfishes

Perciformes Perciformes (), also called the Percomorpha or Acanthopteri, is an order or superorder of ray-finned fish. If considered a single order, they are the most numerous order of vertebrates, containing about 41% of all bony fish. Perciformes means ...

There are 144 species, one subspecies, and one subpopulation in the order Perciformes assessed as critically endangered.

Cichlids Cichlids are fish from the family Cichlidae in the order Cichliformes. Cichlids were traditionally classed in a suborder, the Labroidei, along with the wrasses ( Labridae), in the order Perciformes, but molecular studies have contradicted th ...

Species Subspecies *'' Chromidotilapia guntheri loennbergii''

Percids

Gobies Gobiidae or gobies is a family of bony fish in the order Gobiiformes, one of the largest fish families comprising more than 2,000 species in more than 200 genera. Most of gobiid fish are relatively small, typically less than in length, and the ...

Other Perciformes

Species Subpopulations * Atlantic wreckfish ''(Polyprion americanus)'' (1 subpopulation)

Characiformes Characiformes is an order of ray-finned fish, comprising the characins and their allies. Grouped in 18 recognized families, more than 2000 different species are described, including the well-known piranha and tetras.; Buckup P.A.: "Relationsh ...

Other ray-finned fish species

Other fish species

References

01 *Fish

Critically endangered fish As of July 2017, the International Union for Conservation of Nature (IUCN) lists 1,000 critically endangered fish species, including 87 which are tagged as ''possibly extinct''. 3.0% of all evaluated fish species are listed as critically endan ...

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