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Invader Species Threaten Great Lakes Fishery
The Great Lakes region is trying to fight off aggressive non-native species, which pose a major threat to other wildlife, human health, waterways and the economy.
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Sea lamprey mouths (Great Lakes Fishery Commission)
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Lake trout with a scar from a sea lamprey. (Center for Great Lakes and Aquatic Sciences)
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Zebra mussels cover a Lake Erie beach, causing property damage and disruptions to the food web. (Great Lakes Environmental Research Lab)
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Zebra mussel colonies can clog intake pipes at water treatment plants, industrial facilities and power generation plants. (Don Schloesser, USGS, Biological Resources Division)