The Don whitefin gudgeon (Romanogobio tanaiticus)Kottelat, M. and J. Freyhof, 2007. Handbook of European freshwater fishes. Publications Kottelat, Cornol, Switzerland. 646 p. s a species of freshwater ray-finned fish belonging to the family Gobionidae, the gudgeons. It is distributed in the Don River basin in Russia, and also in the Siverskyi Donets River in Ukraine. The maximal length is 10.7 cm, maximal reported age 5 years.
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