Coregonus tugun is a freshwater fish of the whitefish genus, whitefish family. Endemic of Siberia. It inhabits rivers from the Ob to the Yana. River and lake-river fish, never goes to sea. Matures at the age of 2 years. Spawning is annual, in the fall, on sandbanks, at a depth of 1-1.5 m. Fecundity 900- 8500 eggs. Overwinters in rivers. Feeds on planktonic organisms, insects falling into water, eats fish eggs. Commercial fish.

The body is low and more rounded in cross-section than in other representatives of the genus. Length up to 20 cm, weighs up to 90 g. In the lateral line 54-76 easily falling scales. Life cycle is short: most fish mature in the second year of life. Lives up to 6 years. Feeds on planktonic crustaceans, insect larvae.