Muksun (Coregonus muksun)
Muksun (Coregonus muksun) – large semi-anadromous fish of the whitefish family (Coregonus), with a length of 75–90 cm and 10.8 kg in weight. The mouth is inferior with an elongated snout. Behind the head, there is a hump. Muksun migrates to rivers in the second half of the summer and does not rise high. It reaches sexual maturity at an age of 6–12. Muksun spawns in northern rivers from the Kara to the Kolyma not annually, in October and November, in cripples at a depth of 1.5–2 m. The fecundity is 40,000–160,000 eggs. Young species in the first year runs into the lower reaches of rivers, where it fattens before puberty. It feeds on crustaceans and benthic invertebrates, mollusks, and fish. The life expectancy is 20 years. It is valuable commercial fish, but its stocks are undermined. It is the target for breeding.