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This early Dec. 2009 photo provided by the Illinois River Biological Station via the Detroit Free Press shows Illinois River silver carp jump out of the water after being disturbed by sounds of watercraft. Many fear that the Asian carp, which can reach 4 feet long and weigh up to 100 pounds, will wreak havoc, not by attacking native fish, but starving them out by gobbling up plankton. Michigan asked the U.S. Supreme Court on Monday, Dec. 21, 2009 to close shipping locks near Chicago to prevent the carp from invading the Great Lakes and endangering their $7 billion fishery. (AP Photo/Illinois River Biological Station via the Detroit free Press, Nerissa Michaels)