Ponticola cyrius, the Kura goby, is a species of gobiid fish endemic to the Kura River in the southern Caucasus countries of Georgia, Turkey, Iran and Azerbaijan.[1] It reaches a length of 13cm (05inches) SL.[1] 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.[1]