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Is it a trout or a salmon?

Trouts and Salmons

- Tail fin forked; body mostly gray with many small light spots--lake trout
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OR

- Tail fin not forked (square tail); body with wavy dark lines on back (vermiculations); sides with some reddish spots often encircled by light blue--brook trout
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Sources: "Fishes of Isle Royale," by K.F. Lagler and C. R. Goldman, Isle Royale Natural History Association, 1982.
Fishes of Wisconsin, by George C. Becker, University of Wisconsin Press, 1983.
Freshwater Fishes of Canada, by W.B. Scott and E.J. Crossman, Fisheries Research Board of Canada, 1973.

copyright 2001 University of Wisconsin Sea Grant Institute