Monotypic freshwater fish genera

Cyrtocara moorii, commonly known as the hump-head, is a species of haplochromine cichlid endemic to Lake Malawi in east Africa where they prefer areas with sandy substrates. It can grow to a length of TL. The species is popular among aquarium keepers where it is known as the hump-head cichlid, blue dolphin cichlid, Malawi dolphin or simply as moorii. It is currently the only known member of its genus. The specific name honours the English cytologist and biologist John Edmund Sharrock Moore (1870-1947).

Aristochromis christyi is a species of fish in the family Cichlidae, which is endemic to Lake Malawi in Africa. It is the only known member of its genus.

Katria is a genus of freshwater fish in the cichlid family. It contains the single species Katria katria, a vulnerable species from the Mangoro and Nosivolo Rivers in east-central Madagascar, that was formerly included in the genus Ptychochromoides. The only other monotypic cichlid genus in Madagascar is Oxylapia, and it is restricted to the same region as Katria. In 2010, the Nosivolo River was designated as a Ramsar Site. The Katria reaches about in length.

The Highland splitfin (Hubbsina turneri) is a species of splitfin endemic to Mexico where it is found in the Lerma River basin. This species grows to a length of TL. It is the only known member of its genus, although some authorities have Hubbina as a subgenus of Girardinichthys and add Girardinichthys ireneae to the subgenus, even treating this taxon as a synonym of G. ireneae. This species was described by Don Fernando de Buen y Lozano in 1940 with the type locality given as Cointzio, Michoacán. The name of the genus honours the American ichthyologist Carl Leavitt Hubbs (1894-1979) while the

Divandu albimarginatus is a species of cichlid native to the Republic of Congo and Gabon in Africa. This species reaches a length of SL. It is currently the only known member of its genus.

Alepidomus evermanni is a freshwater species of silverside endemic to western Cuba. This species grows to in standard length. It is the only known member of its genus. This species was described as Atherina evermanni by Carl H. Eigenmann in 1903 with a type locality of San Cristobal, Cuba. The specific name honours the American ichthyologist Barton Warren Evermann (1853-1932).

Kottelatia is a monospecific genus of ray-finned fish belonging to the family Danionidae. The only species in the genus is Kottelatia brittani which is found in Sumatra and peninsular Malaysia.

Miuroglanis is a monospecific genus of freshwater ray-finned fish belonging to the family Trichomycteridae, the pencil and parasitic catfishes. The only species in the genus is Miuroglanis platycephalus. This species is endemic to Brazil where it occurs in the Solimões River basin. This species grows to a length of NG.

Conorhynchos conirostris is a monotypic genus of catfish (order Siluriformes).

species of fish

species of fish

species of fish

Lampiella gibbosa is a species of armored catfish endemic to Brazil where it is found in the Ribeira de Iguape River basin. This species is the only recognized member of its genus. This species grows to a length of TL.

species of fish

species of fish

Hypodoras forficulatus is the only species in the genus Hypodoras of the catfish (order Siluriformes) family Doradidae. This species is endemic to Peru where it is found in the upper Amazon basin and reaches a length of SL.

Dinotopterus cunningtoni is a species of catfish in the family Clariidae. It is endemic to Lake Tanganyika in Burundi, the Democratic Republic of the Congo, Tanzania, and Zambia. It is of importance in local commercial fisheries. It can reach up to in standard length.

Tomeurus gracilis is a species of poeciliid fish native to South America, in Brazil, Surinam and Venezuela. This species grows to a length of TL. It is the only known member of its genus. This species is classified in the tribe Cnesterodontini in the 5th edition of Fishes of the World, but more recent classifications place it as the only member of the subfamily Tomeurinae, the facultative viviparous poeciliids.

Minyclupeoides dentibranchialus is an extremely small fish () found only in the Mekong Basin in Cambodia. It is the only species in its genus.

Nannoplecostomus eleonorae is a species of armored catfish known only from the upper Rio Tocantins basin in the Brazilian state of Goiás. This species grows to a length of SL. This species is the only known member of its genus and the smallest loricariid catfish known.

Hoplarchus is a genus of cichlid in the tribe Heroini. It contains the single species Hoplarchus psittacus, which is endemic to the blackwater rivers in Brazil, Colombia and Venezuela, including the Rio Negro, Jamari, Preto da Eva, Urubu rivers and upper Orinoco drainages. This fish can reach a length of TL and is important as a food fish to local indigenous peoples. This species is occasionally kept as an aquarium fish and is traded under the common name "parrot cichlid" (a name also used for one other species and a hybrid fish).

REDIRECT Chinese paddlefish

Petersius is monospecific genus of freshwater ray-finned fish belonging to the family Alestidae, the African tetras. The only species in the genus is Petersius conserialis. It is endemic to the Rufiji and Ruvu Rivers in Tanzania. Its natural habitat is rivers.

Romanichthys is a genus of ray-finned fish. It is one of two genera in the tribe Romanichthyini which, along with the tribe Luciopercini, forms the subfamily Luciopercinae of the family Percidae. This happens alongside the perches, ruffes, and darters. The genus contains the single species Romanichthys valsanicola, known as the sculpin-perch, asprete, or Romanian darter.

Foerschichthys flavipinnis is a species of fish in the family Nothobranchiidae native to the western African nations of Ghana, Togo, Benin and Nigeria. This species grows to a length of TL. It is the only known member of its genus. This species was described by Herman Meinken as Aplocheilichthys flavipinnis in 1932 with the type locality given as being near Lagos in Nigeria.

Boesemania is a monospecific genus of freshwater fish in the family Sciaenidae. This genus contains the single species Boesemania microlepis. Also known as the Boeseman croaker and smallscale croaker, this fish lives in southeast Asian rivers.

The pungu (Pungu maclareni) is a species of cichlid endemic to Lake Barombi Mbo in Cameroon where it prefers shallow waters of about in depth. It feeds on invertebrates, sponges, diatoms and macrophytes. This species can reach a length of SL. It is currently the only known member of its genus, nested within the Sarotherodon. The pungu is threatened because of pollution and sedimentation from human activities. Konia, Myaka and Stomatepia are three other equally threatened genera of cichlids that also are endemic to Lake Barombi Mbo. The specific name of this fish honours the Fisheries Developme

Pinirampus pirinampu is a species of catfish (order Siluriformes) of the family Pimelodidae. P. pirinampu is also known as the flatwhiskered catfish.

Oxylapia is a genus of freshwater fish in the family Cichlidae. It contains the single species Oxylapia polli, known locally as the songatana. It is an endangered species, endemic to the Marolambo Rapids in the Nosivolo River (a tributary of the Mangoro River) in east-central Madagascar. It is threatened by habitat loss and sedimentation caused by deforestation. The only other monotypic cichlid genus in Madagascar is Katria, and it is restricted to the same region as Oxylapia. In 2010, the Nosivolo River was designated as a Ramsar Site. The Oxylapia is the conservation flagship species for the

Arnoldichthys is monospecific genus of freshwater ray-finned fish belonging to the family Lepidarchidae, the African tetras. The only species in the genus is Arnoldichthys spilopterus, the Niger tetra. This taxon is endemic to Nigeria.

REDIRECT Pike topminnow

Xenotaenia resolanae, the leopard splitfin, is a species of splitfin endemic to west–central Mexico where it is found in the Purificación and Marabasco River basins in Jalisco and Colima. This species grows to a length of TL. It is found in the aquarium trade and is the only known species in its genus.

Heterochromis is a genus of cichlid fish in the order Perciformes. It is the only genus of the subfamily Heterochromidinae, and contains a single species, Heterochromis multidens, which is endemic to the Congo River Basin in Central Africa. The relationships of Heterochromis to other cichlids have long been controversial, with several morphological features suggesting that it is more closely related to American cichlids than to other African species. Molecular studies have given contradictory results. The most comprehensive analysis done to date found more support for relationship to African c

Xenodexia is a genus of poeciliid fish. It contains the single species Xenodexia ctenolepis, the Grijalva studfish, which is endemic to river basins in Guatemala where it lives in both slow- and fast-flowing waters. Females reach up to in total length and males are somewhat smaller. It is the only member of the subfamily Xenodexiinae.

Luciopimelodus pati is a South American species of freshwater long-whiskered catfish that inhabits the basin of the Río de la Plata and the Blanco River of Argentina, Brazil and Paraguay. Its scientific name originates from its common name patí, though it may be simply referred to as pez gato ("catfish") in Spanish. This species is the only recognized species in its genus.

Acentronichthys leptos is the only species of catfish (order Siluriformes) in the genus Acentronichthys of the family Heptapteridae. This species occurs in coastal streams in Brazil from Rio de Janeiro to Santa Catarina State, in São Mateus, Espírito Santo State and on Leopoldina, Minas Gerais. This species grows to in SL.

The bulldog goodeid (Alloophorus robustus) is a species of goodeid. It is endemic to stagnant and slow-flowing waters in the Lerma–Chapala, Presa de San Juanico and Balsas basins in west-central and southwestern Mexico. Despite its relatively wide range, it is generally uncommon. This is possibly the most predatory goodeid, it feeding on other fish, crayfish, insects and other invertebrates. At up to at least in standard length, this is likely the second-largest goodeid, after Goodea atripinnis.

Cheilochromis is a genus of freshwater fish in the cichlid family. It contains the sole species Cheilochromis euchilus, the Malawi thicklip, which is endemic to Lake Malawi in East Africa where it prefers near-shore areas with rocky bottoms. This species reaches a length of TL. It can also be found in the aquarium trade.

REDIRECT Firewood catfish

Blicca is a monospecific genus of freshwater ray-finned fish belonging to the family Leuciscidae. The only species in the genus is Blicca bjoerkna, the white bream or silver bream. This species is found in Europe and Western Asia.

REDIRECT South American lungfish

Apistogrammoides pucallpaensis is a South American dwarf cichlid that reaches up to in standard length. This fish is found in the western Amazon basin, including the systems of the lower Ucayali, lower Japurá and upper Amazon River, in Peru, Colombia and Brazil. It typically lives among leaf litter or floating plants in water with little or no current. It is the only known member of the genus Apistogrammoides, but it is closely related to Apistogramma.

Acanthocharax is a genus of freshwater ray-finned fish belonging to the family Characidae. It contains the single species Acanthocharax microlepis, which is endemic to Guyana, where it is found in the Essequibo River basin. It is found in fresh water at pelagic depths. This species is native to a tropical climate. This fish can reach a length of about .

Limbochromis robertsi is a species of cichlid endemic to Ghana where it is found in the upper reaches of the Pra River Basin. This species has been recorded reaching a maximum length of TL. It is currently the only known member of its genus. The specific name honours the American ichthyologist Tyson R. Roberts who collected the type. Deforestation driven by increased agriculture and small-scale mining operations has reduced the total population of this species by approximately 90% from the early 1990s to 2018.

Auxidens is a monospecific genus of freshwater ray-finned fish belonging to the family Stevardiidae. The only species in this genus is Aulixidens eugeniae, a characin, endemic to the Orinoco River basin in Venezuela.

Coptobrycon is a monospecific genus of freshwater ray-finned fish belonging to the family Acestrorhamphidae, the American tetras. The only species in this genus is Coptobrycon bilineatus, a species which is endemic to Brazil, where it is known to occur in the upper Tietê River basin and in coastal basins that drain the Serra do Mar near the municipalities of Mogi das Cruzes and Bertioga in São Paulo state. It is found in clear water with abundant aquatic vegetation and submerged tree trunks, where it lives in shoals. Its diet is mainly plant matter, with some animals eaten as well. It appears