rock crab

plural rock crabs

1. Any of several kinds of crabs often found on rocky coasts, especially
   1. Hemigrapsus sexdentatus, a large-eyed marine crab found off the coast of New Zealand, the common rock crab
   2. Cancer irroratus, the Atlantic rock crab, a crab with large marginal teeth, found along the Atlantic coast of North America
   3. Romaleon antennarium, the Pacific rock crab of parts of the Pacific coast of North America.
   4. A red rock crab.