In the Kuchurgan reservoir there are 40 species of fish, of which in the control fish catches of 2007-2017 were recorded 13 commercial species. The most numerous species is the silver crucian - 22% of all fish in the catches, the remaining species occupy from 4.3 to 0.02%, which indicates the imbalance of the commercial herd of fish and the need for measures to improve the ichthyological situation in the reservoir. The accumulation of metals (V, Mo, Pb, Ni, Cd, Zn, Cu) in the organs and tissues of 3 species of fish of the Kuchurgan reservoir (Carassius auratus gibelio, Hypophthalmichthys nobilis Perca fluviatilis) was studied. In the species of fish studied, metals are the least concentrated in the gonads and muscles of the trunk, while their maximum concentrations are mostly noted in the gills and skin, with the exception of copper, which accumulates more in the liver of fish.