Definition of shore crab
: any of numerous crabs living between the tidemarks: such as a : green crab b : a spider crab of the genus Libinia common along the eastern coast of the U.S. c : any of several grapsoid crabs of the western coast of North America —usually used with a qualifying term — see purple shore crab striped shore crab yellow shore crab d : a common South Australian grapsoid crab (Leptograpsus variegatus)
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