The Grass Valley speckled dace occurred in a single spring-fed creek in a grassy meadow in eastern Lander County, Nevada. Specimens were collected only once, in 1938 and it was then common. The species had a distinctive speckled lower lip and silver sided body. The introduction of brook and rainbow trout to the creek is believed to be the reason for their extinction.
The Banff longnose dace was a diminutive version of the eastern longnose dace, its range restricted to a small marsh fed by two hot springs on Sulphur Mountain in Banff National Park in Banff, Alberta.
The giant salmon carp, also termed the Mekong giant salmon carp, is a species of freshwater fish in the family Cyprinidae and the single species in the monotypic genus Aaptosyax. It is endemic to the middle reaches of the Mekong River in northern Cambodia, Laos and Thailand. Its population is much reduced (>90%) as a result of overfishing and habitat degradation, and it is now considered Critically Endangered.
The Proserpine shiner is a species of ray-finned fish in the family Cyprinidae. It is found in Mexico and the United States. Its natural habitat is rivers.
Salinas chub is a species of fish in the family Cyprinidae. It is found only in Mexico, classified as endangered.
Telestes fontinalis, the Spring pijor, is a species of ray-finned fish in the family Cyprinidae. It is found only in Croatia. Its natural habitats are intermittent rivers and inland karsts. It is threatened by habitat loss.
Pseudophoxinus zeregi, also known as the Levantine spring minnow, is a species of ray-finned fish in the family Cyprinidae. It is found in Turkey and Syria. Its natural habitat is rivers. The species of Pseudophoxinus zeregi is threatened by extinction because of rapid habitat loss.
The Las Vegas dace is a species of cyprinid fish.
Squalius svallize is a species of freshwater fish in the family Cyprinidae. It is found in Bosnia and Herzegovina and Croatia. Its natural habitats are rivers and inland karsts. It is threatened by habitat loss.
Telestes muticellus is a species of ray-finned fish in the family Cyprinidae. Commonly known as vairone, it is found in France, Italy, and Switzerland.
Iberocypris palaciosi or Squalius palaciosi is a species of cyprinid fish. It is endemic to Spain where it is known with the name bogardilla.
The Bakır shemaya is a species of ray-finned fish in the genus Alburnus. It is endemic to the Bakır River in western Anatolia, Turkey. It is threatened by river pollution and damming.
The longjaw minnow is a species of cyprinid fish that is endemic to the United States.
Redeye chub is a species of cyprinid fish native to freshwaters of eastern North America.
The metallic shiner is a species of ray-finned fish in the genus Pteronotropis.
Umpqua dace is a species of ray-finned fish in the genus Rhinichthys. It is endemic to the United States where it inhabits the Umpqua River drainage in Oregon.
Umatilla dace is a species of ray-finned fish in the genus Rhinichthys. It is found in the drainage basin of the Columbia River in British Columbia, Washington state, Oregon and Idaho.
The Kura nase or southern Caspian nase is a species of ray-finned fish in the genus Chondrostoma.
The cheat minnow is a demersal, freshwater fish endemic to the United States, most commonly found in the Ohio River basin. It is the only species in the genus Pararhinichthys. Its taxonomic status is debatable and Pararhinichthys bowersi is most likely to refer to an F1 hybrid of Rhinichthys cataractae and Nocomis micropogon.
The redside shiner is a species of cyprinid fish found in the western United States and Canada.
