(species Salvelinus malma), char of the family Salmonidae, found in northwestern North America and northeastern Asia. It has yellow spots on the back, reddish spots on the sides, and a white edge on the lower fins; it takes its name from that of a character in Charles Dickens' Barnaby Rudge. It often migrates to sea, grows large and silvery, and returns to streams to spawn. A good food and game fish, it has an average size of about 0.5 to 1.8 kg (1 to 4 pounds) but may be much larger.