Erythroculter ilishaeformis Culter alburnus, the topmouth culter, is an East Asian species of freshwater ray-finned fish genus Culter, this belongs to the family Xenocyprididae.

Culter alburnus occurs in Lake Buir, the Onon and Kherlen River drainages in Mongolia, as well as the Amur and Red River drainages in Far East Russia and China, it has also been recorded from Taiwan and Hainan.

It can be found in rivers and floodplain lakes which have dense growth of macrophytes.

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