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Photo of a Red Rock Crab

Species profile

Red Rock Crab

Cancer productus

Crabs/lobsters/shrimp13.9K iNat observations

At a glance

Red Rock Crab (Cancer productus) is a crustacean regulated in 6 of 66 jurisdictions tracked by CatchRules across the U.S. and Canada.

The strictest bag limit is 2 (British Columbia); the most generous is 50 (New Hampshire).

Across 3 jurisdictions with stated minimum sizes, the average minimum is 4.5 in.

Confirmed by 13,629 research-grade iNaturalist observations, with British Columbia, Washington, and California the top jurisdictions by observation count.

Notable details

  • Its carapace can reach 8 inches wide, making it one of the largest Pacific coast crabs.
  • Adults are vivid red, but juveniles display a striking mottled black-and-white pattern.
  • Found from Alaska to Baja California, it lives in rocky intertidal and subtidal zones.
  • Its powerful claws can deliver a painful pinch strong enough to crack mussel shells.
  • It is a capable predator of mussels, barnacles, and other hard-shelled invertebrates.

Background

Cancer productus, one of several species known as red rock crabs, is a crab of the genus Cancer found on the western coast of North America.

Background excerpt adapted from Wikipedia's Red Rock Crab article (CC BY-SA). Visit Wikipedia for the full entry.

Photo credit: iNaturalist / Wikipedia. Identification reference only — verify regulations with the issuing wildlife agency before retaining a catch.