It has been recorded in the drainages of the Volga and the Ural, as well as in Lake Balkhash and the upper Syr-Darya drainage. Records else where require confirmation as this species is similar to a number of others.[1] In Scotland it is regarded as an introduced non native species,[4] and this is probably the case in Ireland.[1] Introductions are likely to have occurred elsewhere, including Norway.[3][4]