MINNEAPOLIS (WCCO) — The Department of Natural Resources say they have confirmed the presence of adult zebra mussels for the first time in a Bemidji-area lake.

Officials say they were first found on one of Cass Lake’s most popular beaches.

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This find has led to the designation of several lakes and waterways as infested, including Pike Bay and the stretch of the Mississippi River between Cass Lake and Lake Winnibigoshish – which was designated as infested last year.

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Andrusia, Big Rice, Buck, Kitchi, Little Rice, Pug Hole and Wolf lakes are all considered infested as well because many boaters travel on these waters from Cass Lake.

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Click here for more information on zebra mussels, a list of designated infested waters and how to prevent the spread of invasive aquatic species.