Stenodus leucichthys is a species of freshwater whitefish in the family Salmonidae. In the strict sense its natural distribution is restricted to the Caspian Sea basin. It is now considered extinct in the wild, but survives in cultured stocks. The nelma, a more widespread species of Eurasian and North America, is sometimes considered its subspecies.
The Spanish toothcarp, also known as the Spanish pupfish or Iberian killifish, is a small, endemic species of fish in the family Cyprinodontidae. Its risk of extinction is one of the greatest of any Iberian vertebrate. Its limited range, coupled with the drastic population decline the species has suffered in the last two decades, has caused it to be placed on endangered species lists, both in Spain and internationally. In addition, habitat fragmentation, likely due to humans, has resulted in this species becoming increasingly stagnant and has led to increased genetic drift. Also found to be contributing to their endangerment was genetic diversity of mitochondrial DNA. The mitochondrial DNA coupled with A. iberus’s geographic distribution has been able to affect their population genetic structure gradually in different spaces. Its conservation status in the south of the Iberian peninsula has notably worsened.
The Danube bleak or Caspian shemaya is a species of freshwater fish in the family Cyprinidae. It is found in Iran, Ukraine, Georgia, Armenia, Slovakia, Moldova, Greece, Czechia, Azerbaijan, Turkiye, Afghanistan, Austria, Bosnia and Herzegovina, Bulgaria, Croatia, Switzerland, Germany, Hungary, Italy, Romania, Russia, Serbia, Slovenia, Turkmenistan, and Uzbekistan.
Aphanius anatoliae, the Anatolian giant killifish or Lake Tuz toothcarp, is a species of fish in the family Cyprinodontidae. It is endemic to Turkey. It is known from freshwater springs and streams around Lake Tuz, as well as from the Lake Beyşehir basin and from Konya eastward to Niğde. It lives in clear, well-oxygenated running freshwaters. It is threatened by water abstraction and the drying out of streams and springs. It is also impacted by the introduction of Gambusia species.
Aphanius is a genus of pupfishes. Unlike other members of the family which are from the Americas, Aphanius species are native to northern Africa, southwestern Asia and southern Europe. Several species in the genus have very small distributions and are seriously threatened.
Apricaphanius baeticus is a species of fish in the family Cyprinodontidae. It is endemic to a small part of Southern Spain, between the Gulf of Cadiz and Huelva. Its natural habitats are rivers, estuarine waters, and coastal saline lagoons. It is threatened by habitat loss and by invasive species.
The Mediterranean killifish, Mediterranean banded killifish or South European toothcarp is a species of fish in the family Cyprinodontidae. It is found in Albania, Algeria, Bosnia and Herzegovina, Croatia, Cyprus, Egypt, France, Greece, Israel, Italy, Lebanon, Libya, Malta, Morocco, Montenegro, Slovenia, Syria, Tunisia, and Turkey. Its natural habitats are saline lakes, saline marshes, and coastal saline lagoons.
Aphanius sirhani, the Azraq toothcarp, is a species of fish in the family Cyprinodontidae. It is endemic to the Azraq Wetland Reserve in Jordan. This species occurs in shallow water where there is vegetation and stones, or over muddy substrates where it feeds on insect larvae and crustaceans. They breed in the Spring.
Aphanius splendens, the Gölçük toothcarp or splendid killifish, is an extinct species of freshwater fish in the family Cyprinodontidae. It was endemic to Lake Gölçük in Turkey. It became extinct due to the effects of fish introduced to the lake.
Aphanius sureyanus, the Burdur toothcarp or Sureyan killifish, is a species of freshwater fish in the family Cyprinodontidae.
Aphanius transgrediens, the Acı Göl toothcarp or Acipinar killifish, is a species of freshwater fish in the family Cyprinodontidae. It is endemic to the springs of Lake Acıgöl in Turkey. It is threatened by a reduction in rainfall from climate change, and the abstraction of water from the springs. The introduction of the non-native eastern mosquitofish also threatens this species.
The scaleless killifish or Hazar toothcarp is a species of freshwater fish in the family Cyprinodontidae. It is the only species in its genus, and is endemic to Lake Hazar in Turkey. It is a pelagic species that comes to shore in spring–early summer to spawn. It is threatened by the falling water levels of Lake Hazar due to water abstraction and reduced rainfall due to climate change.
Stenodus nelma, known alternatively as the nelma, sheefish, siifish, inconnu or connie, is a commercial species of freshwater whitefish in the family Salmonidae. It is widespread in the Arctic rivers from the Kola Peninsula eastward across Siberia to the Anadyr River and also in the North American basins of the Yukon River and Mackenzie River.
Aphanius danfordii, the Kızılırmak toothcarp or Sultan Sazlığı toothcarp, is a species of killifish belonging to the family Cyprinodontidae. It is endemic to the Kızılırmak River and the upper Seyhan River drainage systems and is now restricted to a few locations in the Sultan Sazlığı marshes. Though little data is available, the population of the fish seems to be declining. The International Union for Conservation of Nature has rated its conservation status as being "critically endangered" and fears it may become extinct in the wild if the drainage of the marshes continues.
The Arabian toothcarp, known also as the Arabian pupfish or mother-of-Pearl fish is a species of killifish belonging to the family Cyprinodontidae. It can be found from the shores of the Red Sea south to Ethiopia, the Gulf of Aden, the Arabian Sea and along the Persian Gulf east to Pakistan and India. It is also found in the Suez Canal, the northern coast of the Sinai Peninsula, and in one location on the Palestinian coast. There are two recognized subspecies: A. d. dispar found throughout the range, and A. d. richardsoni, the Dead Sea toothcarp endemic to the Dead Sea.
The Sakarya toothcarp is a species of freshwater fish in the family Cyprinodontidae. It is endemic to the upper Sakarya River basin in Turkey. It is threatened by water abstraction, damming and a reduction of rainfall due to climate change. The specific name honours the German zoologist Wolfgang Villwock (1930-2014) of the University of Hamburg.
The Almiri toothcarp or Almiri killifish is a species of pupfish belonging to the family Cyprinodontidae. It can be found in a handful of brackish springs and marshes in the Peloponnese, Greece. Due to one of the springs being dammed up with rocks in the late 1990s to early 2000s, the IUCN considers the fish to be critically endangered on criteria B1ab and B2ab ; it is possibly extinct at its type locality.
