shore crab

noun

Definition of shore crab

: any of numerous crabs living between the tidemarks: such as
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)