Wisconsin Fish Diseases

Even though we are reporting on fish disease in Wisconsin, we encourage you to continue to enjoy your fishing experiences around Wisconsin. The information we have gathered for you is to help prevent the spread of the diseases and as information so you know what disease you may encounter and what to look for in the fish you catch.

Anglers: you can continue to enjoy catching and eating your catch as long as you fully cook them before eating.

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Lymphosarcoma found in northern pike, Little Sturgeon Bay, February 22, 2008.

Blackspots in bluegills and other panfish species

Clinostomum (grubs in fish) usually found in bluegills and other panfish

Heterosporis (Yellow Perch Parasite)

Viral Hemorrhagic Septicemia virus (VHSv)

If you catch a diseased fish or observe a fish kill take the following steps.

For more information on the parasites listed above, please contact Sue Marcquenski, (608) 266-2871.

For more information on other fish parasites, please see the DNR's Web site on Invasive Species.