A member of the Salmonidae family, the mountain whiteﬁsh provides an important winter ﬁshery in certain areas, especially where steelhead are absent.
IdentificationPossessing an adipose fin and an axillary process, the mountain whiteﬁsh is long, slender, and nearly cylindrical, although not quite as cylindrical as the round whiteﬁsh. It is nevertheless among the species referred to as “round whitefish” and can be distinguished from the lake whiteﬁsh, which is more laterally compressed than is the mountain whitefish.
Silvery overall, it is dark brownish to olive or greenish to blue-gray above, with scales that often have dark borders and ventral and pectoral ﬁns that may have an amber shade in adults. The small mouth is slightly subterminal, and the snout extends clearly beyond it. The caudal ﬁn is forked, and there are 74 to 90 scales down the lateral line and 19 to 26 gill rakers.