Grape cluster like tumor. Walleye dermal sarcoma produces warty growths commonly seen on the fish's skin and fins. Growths are usually gray-white or pinkish in color.
This disease is only seen in walleye.
Infections occur throughout the year but at a higher rate during the walleye's spring spawning season. Walleyes congregate on their spawning grounds and the virus spreads from fish to fish through physical contact.
Found predominantly in the Upper Midwest and Great Lakes Region. Occurs throughout Minnesota.
The disease is not known to infect humans. As always, cook fish thoroughly.
There are no practical ways to control this disease.
Skin of infected walleye should be buried or disposed with household waste. Fish entrails should never be discarded back into the lake.