Zebra mussels came to the great lakes years ago. In Lake St. Clair, they exploded and were a big problem for a number of years but their number tapered off and native fish such as perch were found eating the smaller ones.
They also have had a major positive effect on the clarity of the lake water since they filter out the particles that make the lake dirty........
I'm familiar with the infestations in Duluth/Superior. They are migrating up the St Louis River and have spread to the St Croix/Mississippi River systems via boaters and are being spread by the barges traveling on the river. You are welcome to all of ours.
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"Zebra mussels arrived in the ballast water of transoceanic ships in 1989. They are clogging water intake pipes across the Great Lakes and eating plankton needed by young fish. Some companies are spending up to $2 million annually to control this exotic mussel. Zebra mussels attach to hard surfaces, such as boat hulls and motors, and can also attach to aquatic plants. Microscopic larvae can be transported in water in bait buckets, live wells and bilges..."
They are a curse that is slowly spreading into freshwater lakes and rivers, competing all too successfully with the native mussels.