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Issues Concering the Great Lakes
Zebra mussels washed up on beach,  Lake Erie Zebra mussels washed up on beach,  Lake Erie
Bay City Times (courtesy Great Lakes Environmental Research Lab)

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Zebra mussel, Detroit River Zebra mussel, Detroit River
Center for Great Lakes and Aquatic Sciences


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Zebra mussel, Detroit River Zebra mussel, Detroit River
Center for Great Lakes and Aquatic Sciences


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Sea lamprey, Unknown location Sea lamprey, Unknown location
Great Lakes Sea Grant Network Exotic Species Graphics Library

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Lake trout with scar from sea lamprey, Unknown location Lake trout with scar from sea lamprey, Unknown location
Center for Great Lakes and Aquatic Sciences


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Sea lamprey on lake trout, Unknown location Sea lamprey on lake trout, Unknown location
US Fish and Wildlife Service


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Eurasian ruffe, Unknown location Eurasian ruffe, Unknown location
Gary Cholwek, National Biological Service


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White perch, Lake Erie White perch, Lake Erie
Minnesota Sea Grant, Jeff Gunderson


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Alewife, Unknown location Alewife, Unknown location
Center for Great Lakes and Aquatic Sciences, David Jude


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Spiny water flea, Unknown location Spiny water flea, Unknown location
US Fish and Wildlife Service

 
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Spiny water flea clogging gill net, Lake Superior, Minnesota Spiny water flea clogging gill net, Lake Superior, Minnesota
Steve Geving, Minnesota Department of Natural Resources



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Three-spine stickleback, Taconite Harbor, Minnesota Three-spine stickleback, Taconite Harbor, Minnesota
Minnesota Sea Grant, Jeff Gunderson

 
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Tubenose goby, Unknown location Tubenose goby, Unknown location
Center for Great Lakes and Aquatic Sciences

 
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Round goby, Unknown location Round goby, Unknown location
Center for Great Lakes and Aquatic Sciences

 
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Rusty crayfish, Lake Superior Rusty crayfish, Lake Superior
Minnesota Sea Grant, Jeff Gunderson

 
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Purple loosestrife, Saginaw Bay, Lake Huron Purple loosestrife, Saginaw Bay, Lake Huron
US Environmental Protection Agency, Karen Holland


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