The anatomic, correct image of the Ruff. Eyes greater. A fin very prickly. Branchiate covers with thorns. A back grey-green. The belly more often white, depends on a place of dwelling. Length about 13 centimeters. Weight of the largest copies of 400 gram. The fish is very unpretentious. Does not love strong currents, prefers the rivers or gulfs, or holes with whirlpools.