| http://www.w3.org/ns/prov#value | - They escaped into the wild and have spread into the Mississippi and other rivers and lakes across the nation's heartland.(MORE: Sea Lions Removed from Threatened Species List)Of greatest concern in the Great Lakes region are bighead and silver carp, prolific breeders that gobble huge amounts of plankton - tiny plants and animals that are vital to aquatic food chains.
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