Whitefish (Coregonus cylindraceus)
Whitefish (Coregonus cylindraceus) – a fish of Coregonidae family. The body is plump, cylindrical in cross section. The head is elongated. The upper jaw protrudes over the lower. There are dark round spots on the head. Young fishes have spots in the body as well. The length is 28–85 cm; the weight is 400 g, maximum 700 g. The age of sexual maturity is 5–8 years old. The sprawning comes every year, in October–November, and happens in rush current. The average fertility is 14,000 eggs. It feeds on insect larva. It spreads in the rivers of Siberia from the Yenisei to the Kolyma, the Anadyr, and the Penzhina. The economic significance is not very big.