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(Coregonus nasus), a lake and river fish with a body length reaching 80 cm and a weight of 2–4 kg (sometimes to 16 kg). The broad whitefish is common in the basin of the Arctic Ocean from the Pechora to the Anadyr’. It is sometimes found in the salt waters of gulfs and bays. The fish reaches sexual maturity at six or seven years of age. Spawning occurs in October and November. The female deposits 13,000 to 135,000 large eggs that reach 4 mm in diameter. The broad whitefish feeds mainly on benthic invertebrates. It winters in river channels. The fish is commercially valuable.