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a genus offish of the carp family. Length, 8-14 cm. The spine is dark, and the sides and belly of the fish are silvery. The scales are of average size. There are four species, found in the fresh-water reservoirs of Europe and Southwest and Middle Asia. There are three species in the USSR. They feed on aerial and water insects, as well as on zooplankton. They spawn from May to June. They have no commercial significance.