The river Volga is the largest river of Europe and one of the largest rivers of the world. Volga proceeds in the territory of the 11 Russian regions and 4 republics. Length of this river is 3530 km. Volga is used as a hydraulic power source. There are 9 reservoirs with hydroelectric power stations on the river. About 70 species of fish, including 40 trade species of fish live in Volga.