The northern whitefin gudgeon (Romanogobio belingi) is a species of freshwater fish in the Cyprinidae family. It is distributed in the Northern Black Sea basin (Dniester, Southern Bug and Dnieper riverine systems), Southern Baltic Sea basin (Oder, Vistula), Southern North Sea basin (Elbe, Rhine). There are also reports from lakes Ilmen and Ladoga and its basins, which are questionable. The maximal length is 11.5 cm, maximal reported age 5 years.