The wide delta of Kuban, with its abundant estuaries, is especially rich in plankton and benthos. There are about 400 species of zooplankton, including rotifers, copepods, cladocerans, mollusks, worms, etc., providing abundant food for fish. The fish fauna of the Kuban differs from that of the nearby Don and Volga rivers and contains more than 65 species from 16 families. They are dominated by the genera "Gobio", "Romanogobio", "Squalius" and "Chondrostoma" and contain species and genera such as carp, Prussian carp, roach, bream, silver bream, pike, perch, ruffe, "Chalcalburnus", "Sprattus", "Mugil" and others. Some species such as silver carp and grass carp were acclimatized in the last decade.