...tankers and quickly spread through the Great Lakes and into the Mississippi. In Minnesota, they've been found in Lake Zumbro, Lake Pepin, the St. Croix River and the Duluth-Superior harbor. The Coast Guard issued the guidelines because humans...

...mussels first were found in Minnesota in 1989. Ossawinnamakee is the second inland lake to be invaded. The other is Zumbro Lake near Rochester. The mussels are also present in the Zumbro River, the Mississippi River below Minneapolis, the lower...