It is found in Poland in rivers, lakes and ponds, as well as in the coastal waters of the Baltic Sea. It has a short body, side-swept, not very tall, 20-35 cm long, maximum 44 cm, and weighs 2 kg. The back is dark brown or greyish blue with a bluish or greenish sheen, the sides are light silver, and the belly is white. Dorsal and caudal fins grey with reddish tinge, ventral and anal fins red. Red iris. Eats both plant and animal food.
White and lean meat, fairly well-boned.