Round goby

Round goby (Neogobius melanostomus) — small fish of family bychkovy, the body thickset, is completely covered with scales which come also on a nape; mouth of moderate length, its corners don't come for eyes; coloring various, from light gray with not clear spots on each side, to brown with accurate drawing or black. characteristic sign of this look — the accurate black spot sometimes surrounded with a yellowish border, on back part of the first back fin; the head is more dark trunks, fins gray.
In Belarus lives in Dnepr and its largest inflows.