Biwia is a genus of freshwater ray-finned fish belonging to the family Gobionidae, the gudgeons. The fishes in this genus are found in Korea and Japan.
Species Biwia springeri (Bănărescu & Nalbant, 1973) Biwia tama (Ōshima, 1957) Biwia yodoensis Kawase & K. Hosoye, 2010 Biwia zezera (Ishikawa, 1895)
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