The Syr Darya sturgeon (''Pseudoscaphirhynchus fedtschenkoi'') is a species of fish in the family Acipenseridae. It is found in Kazakhstan, Tajikistan and Uzbekistan, where it is

endemic Endemism is the state of a species being found in a single defined geographic location, such as an island, state, nation, country or other defined zone; organisms that are indigenous to a place are not endemic to it if they are also found else ...

to the

Syr Darya River The Syr Darya (, ),, , ; rus, Сырдарья́, Syrdarjja, p=sɨrdɐˈrʲja; fa, سيردريا, Sirdaryâ; tg, Сирдарё, Sirdaryo; tr, Seyhun, Siri Derya; ar, سيحون, Seyḥūn; uz, Sirdaryo, script-Latn/. historically known ...

and, before its drainage, the Aral Sea. Due to the loss of its breeding site and

dam A dam is a barrier that stops or restricts the flow of surface water or underground streams. Reservoirs created by dams not only suppress floods but also provide water for activities such as irrigation, human consumption, industrial use ...

ming projects over the length of the river, it is currently considered Critically Endangered and likely extinct, as no sightings have been reported since the 1960s. The sturgeon is among the 25 "most wanted lost" species that are the focus of Global Wildlife Conservation's "Search for Lost Species" initiative. Stamps of Tajikistan, 011-03

References

Pseudoscaphirhynchus Freshwater fish of Asia Fish of Central Asia Fauna of Tajikistan Critically endangered fish Critically endangered fauna of Asia Fish described in 1872 Taxonomy articles created by Polbot {{Acipenseriformes-stub