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The invasive carp — a family of fish that also includes the Bighead carp, Black carp and Grass Carp — first turned up in the Mississippi River about 50 years ago. Experts say fish began overwhelming the waterway after escaping Arkansas fish farms, where they were imported to help limit algae and weed growth. In the intervening years, the fish expanded their range throughout the river and its tributaries — beginning to dominate the Illinois River in the 1990s. From the back of the carp sampling b

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