For clam harvesters in Maine, invasive green crabs are voracious predators that threaten their livelihood. One green crab (Carcinus maenas) can devour 40 half-inch clams in a single day, according to the Washington Department of Fish and Wildlife. University of Maine food scientists Beth Calder and Denise Skonberg and former graduate student Joseph Galetti have read more Food for thought: Green crab pastries pass UMaine taste test