James Carlton, director of Williams-Mystic, the Marine Studies Program of Williams College and Mysti...

Jack Milton/Staff Photographer: James Carlton, director of Williams-Mystic, the Marine Studies Program of Williams College and Mystic Seaport, in Connecticut, examines an unidentified isopod in a lab at the University of southern Maine Monday, July 30, 2007. The crustacean was found at the Darling Marine Center in Walpole, by researchers lookinng for invasive plants and animals on floating docks and pilings, and has also been found in Portland. marine biology (Photo by Jack Milton/Portland Press Herald via Getty Images)