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  Brown trout  

Department of Natural Resources

Illinois Exotic Species:
brown trout Salmo trutta

The brown trout has orange or rust-colored spots on its sides. Its tail fin is not forked, and an adipose fin is present. This fish's back is olive-brown with scattered dark spots while the lower sides and belly are yellow or white. The inside of the mouth is white. This fish may exceed forty pounds in weight. The brown trout lives in cool lakes and streams, feeding from dusk to morning. It eats whatever is available, including fishes. The brown trout is a native of Europe, Africa and Asia. It was introduced into the United States about 1883. It may be found in Lake Michigan in Illinois, where it is maintained in by an annual stocking program.

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