[2] Dungeness crab (Metacarcinus magister) has serrations on the dorsal side of the chelipeds and lacks black tips.

The graceful rock crab (Metacarcinus gracilis) has a single projection on the dorsal side of the chelipeds and also lacks black tips, and the widest point of carapace is at the second posterior-most tooth.

Cancer productus ranges from Kodiak Island, Alaska, to Isla San Martine, Baja California.

[3] Cancer productus is carnivorous; in Puget Sound it will crush barnacles with its large pincers for consumption.

[5] Cancer productus is harvested by sport and commercial fishermen in California, mostly from Morro Bay south.