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Baton Rouge, LA (AP) – Parks officials in Louisiana’s capital city say more than 500 grass-eating carp have been released into a lake to help gobble up vegetation taking over the water. The Advocate reports that a warmer winter and an excess of nutrients from runoff has allowed vegetation to flourish in Baton Rouge’s City Park Lake. The fish released Thursday cost around $5.50 each and were driven down from a fishery in Arkansas. Officials say it will take at least six months for the bottom feeders to make a dent in the overgrowth. In an additional $50 million effort, the city will dredge six neglected lakes in 2020.