''Ponticola cyrius'', the Kura goby, is a species of gobiid fish

endemic Endemism is the state of a species being found only 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 foun ...

to the Kura River in the southern

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countries of

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and

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.Brian W. Coad
Freshwater Fishes of Iran
(accessed 18 Feb 2015) It reaches a length of SL. It lives in the upper parts of the Kura River, Massuleh River and the Pasikhan River and in the Anzali Mordab (Iran). Downstream in Kura it is replaced by '' Ponticola gorlap''.

References

Ponticola Freshwater fish of Western Asia Taxa named by Karl Kessler Fish described in 1874 {{Gobiidae-stub