Wikipedia
Muksun
The muksun (Coregonus muksun) is a type of whitefish widespread in the Siberian Arctic waters. It is mostly found in the freshened areas of the Kara and Laptev Seas and up the major rivers, as well as in Lake Taymyr.
Like all whitefishes, it is a silvery, fusiform fish. The average length of mature fish is 33 cm and weight of 1-2 kg, and it can reach a length of 75 cm and a weight of 7-8 kg. Depending on population, the muksun can live up to 16-25 years of age. It is valuable commercially as well as locally as a source of food.