The
freshwater whitefish are fishes of the
subfamily Coregoninae, which contains whitefishes (both freshwater and
anadromous) and
ciscoes, and is one of three subfamilies in the salmon family
Salmonidae. Apart from the subfamily Coregoninae, the family Salmonidae includes the salmon, trout, and char species of the subfamily Salmoninae, and grayling species of the subfamily
Thymallinae. Freshwater whitefish are distributed mainly in relatively cool waters throughout the northern parts of the Northern Hemisphere.