Common Name: Round Whitefish
Other Names: Frostfish, Round Fish, Menominee Whitefish
Scientific Name: Prosopium cylindraceum
Adult Size: Round whitefish are relatively long-lived with individuals up to 8 years of age common in most lake populations. Growth tends to be slower than that of lake whitefish and few individuals seen greater than 18 inches. Lengths usually range from 10-14 inches.
Identification: Round whitefish are noticeably cylindrical in body shape. They are dark brown on the back fading to silvery sides and silvery-white below. Pectoral and pelvic fins are typically light orange in color. Scales are large. An adipose fin, characteristic of members of the Salmonid family, is located on the back between the dorsal and caudal fins. The mouth is small and toothless as adults.