The stock structure of Dungeness crab (Cancer magister) on the Pacific coast of North America is not clear, with studies from Oregon showing no evidence of sub-structuring (O’Malley K, and Roegner C 2013) but studies from British Columbia showed differentiation of several populations (Beacham TD and Supernault J 2008). Further genetic studies with a broader scope are currently underway. Dungeness crab in California has been shown to be structured as five sub-populations (California Department of Fish and Game 2001) but is not formally assessed. It is managed state-wide, although fishery seasons differ geographically (California Department of Fish and Wildlife 2013).