The wreckfish are a small group of ray-finned fish in the genus Polyprion, belonging to the monotypic family Polyprionidae in the order Acropomatiformes.
Characodon is a genus of splitfins endemic to north–central Mexico. Two of the species are highly threatened and restricted to pools, ponds and springs in the upper San Pedro Mezquital River basin in Durango. The third species, C. garmani, was restricted to springs near Parras in Coahuila, but it became extinct when they dried out.
The Chapultepec splitfin, known locally as mexcalpique, is a critically endangered species of fish in the family Goodeidae. It is endemic to Mexico and was originally restricted to lakes and wetlands in the Valley of Mexico, including Lake Texcoco. Through man-made channels it was able to spread to the upper Pánuco River basin. Most native populations disappeared as they were at or near Mexico City, with the waters either being reclaimed, drained, heavily polluted or infested with introduced species. Today the Chapultepec splitfin is only known to survive in three lakes in the Chapultepec park of Mexico City, Lake Xochimilco, Lake Zumpango, Laguna de Tecocomulco northeast of the City where perhaps introduced, and parts of the Pánuco River basin. Most of these remaining populations are small. This species was originally described as Cyprinus viviparus in 1837 by Miguel Bustamante y Septién with the type locality given as "Mexico". In 1860 Pieter Bleeker raised the genus Girardinichthys with a new species Girardinichthys viviparus as its type species, this subsequently proved to be a taxonomy of Cyprinus viviparus.
Zingel is a genus of fish in the family Percidae. They are long and slender, reaching 12 to 48 cm in length. They are found in rivers and streams in Europe. They feed mainly on aquatic invertebrates such as crustaceans and insect larvae, and also eat small fish. While they were all classed as endangered or vulnerable in the past, environmental improvements have allowed some to be reclassified to least concern.
Acanthocobitis pavonacea, also known as the spearfin loach, is a species of ray-finned fish belonging to the family Nemacheilidae, the stone loaches. This species is found in the Brahmaputra River of Assam. This is one of two species in the genus Acanthocobitis, alongside the type species, A. longipinnis. A. longipennis was treated as synonym of this species but in 2021 Maurice Kottelat and Waikhom Vishwanath published a paper that argued that A. longipennis was a valid species and that it was one of two species ofloach in the genus Acanthocobitis, alongside A. pavonacea, with the other species being classified in the genus Paracanthocobitis. This species is the type species of the genus Acanthocobitis.
Heteromormyrus is a genus of freshwater ray-finned fishes belonging to the family Mormyridae, the elephantfishes. These fishes are found in southern and central Africa in Angola, Namibia, the Democratic Republic of the Congo and, maybe, Zimbabwe.
Hyphalophis is a monospecific genus of marine ray-finned fish belonging to the family Ophichthidae, the snake eels. The only member of this genus is Hyphalophis devius, a species known only from its holotype which was collected in the Lesser Antilles southwest of Grenada.
Kertomichthys is a monospecific genus of marine ray-finned fish belonging to the family Ophichthidae, the snake eels. The only member of this genus is Kertomichthys blastorhinos, a species known only from its holotype which was collected in the Atlantic Ocean in the vicinity of French Guiana.
Nemachilichthys is a monospecific genus of freshwater ray-finned fish belonging to the family Nemacheilidae, the stone loaches. The only species in the genus is Nemachilichthys rueppelli, the mongoose loach or Shimoga loach, a species endemic to the Western Ghats in Karnataka and Maharashtra.
Parhomaloptera is a monospecific genus of freshwater ray-finned fish belonging to the family Gastromyzontidae, a group which shares the common name hillstream loaches with the family Balitoridae. The only species in the genus is Parhomaloptera microstoma. It lives in fast-flowing streams and grows to a maximum published total length of 8.8 cm (3.5 in). This taxon is endemi to Borneo, occurring in both East Malaysia and Kalimantan.
Plesiomyzon is a monospecific genus of freshwater ray-finned fish belonging to the family Gastromyzontidae, a group which shares the common name hillstream loaches with the family Balitoridae. The only species in the genus is Plesiomyzon baotingensis, a loach that is endemic to the river systems of Hainan.
Serpenticobitis, popularly known as serpent loaches, is a small genus of loaches found in the Mekong River Basin in Southeast Asia. It is the only genus in the family Serpenticobitidae.
Bangana is a genus of fish in the family Cyprinidae, the carps and minnows. It is distributed across much of southern and eastern Asia. Species live mainly in the flowing waters of tropical and subtropical rivers.
The Kantaka barb is a species of cyprinid fish endemic to the Western Ghats, India. It inhabits large streams, and grows to 15.0 cm (5.9 in) TL.
Pseudocaranx is a genus of ray-finned fishes from the family Carangidae, the jacks, trevallies, scads, and pompanos. They occur in the western Atlantic Ocean and the Indo-Pacific.
Paruroconger is a monospecific genus of marine ray-finned fish belonging to the subfamily Congrinae, the conger eels, in the family Congridae, which also includes the[[garden eel]s. The only species in the genus is Paruroconger drachi, an eel which is known only from the holotype collected in the Eastern Atlantic Ocean off Pointe-Noire in the Republic of Congo.
The pocket-like lip barbel is a species of freshwater ray-finned fish from the carp and minnow family, the Cyprinidae. It occurs in the Nam Xam and Nam Ma river basins in Laos, the Red River basin in Vietnam and Yunnan, as well as in most of the coastal drainage basins of northern Vietnam.
The school bass is a species of marine ray-finned fish, it is the only member of the monotypic genus Schultzea which is part of the subfamily Serraninae which itself is classified within the family Serranidae, along with the anthias and groupers. It is found in the western central Atlantic Ocean. This species is found in deeper waters near coral reefswhere it forms small groups which feed on plankton. The school bass is a synchronous hermaphrodite. The generic name honours the American ichthyologist Leonard Peter Schultz (1901-1986) who was Curator of Fishes at the United States National Museum who examined the specimens described by Loren P. Woods (1914-1979) as Schultzea campachanus, which was later shown to be a synonym of Hildebrand's Serranus beta.
Lobocheilos schwanefeldii is a species of freshwater ray-finned fish belonging to the family Cyprinidae, the family which includes the carps, barbs, minnows and related fishes. This fish is found in Indonesia.
Engkaria is a monospecific genus of ray-finned fish belonging to the family Gastromyzontidae, commonly called the hillstream loaches, although this also refers to the loaches in the family Balitoridae. The only species in the genus is Engkaria eubranchus, a species formerly classified in the genus Hypergastromyzon, which is endemic to the Lupar River basin in southern Sarawak in Malaysian Borneo.
