Invertebrates
Dungeness Crab
Metacarcinus magister · also called dungeness crabs
A Dungeness crab moves across sandy Pacific seafloor with a broad, oval shell built for exactly this habitat, one of countless individuals supporting a fishery valuable enough to define part of a region’s culinary identity. Long before it reaches a dinner plate, though, it plays an equally important role as prey for fish, octopuses, and diving seabirds up and down the coast.
Overview
The Dungeness crab, Metacarcinus magister, is a broad-shelled crab native to coastal waters along the Pacific coast of North America. It supports one of the region’s most valuable commercial fisheries while also serving as an important food source for numerous natural predators.
A fishery built on careful timing
Size limits, protections for breeding females, and defined harvest seasons have kept the Dungeness crab fishery sustainable for generations, a management approach that balances significant commercial demand against the crab’s own need to reach maturity and reproduce.
Status
Least Concern — managed under sustainable fishery regulations along the Pacific coast, with populations remaining widespread and commercially secure.
Dungeness Crab: common questions
Why is the Dungeness crab so important to Pacific Northwest fisheries?
The Dungeness crab supports one of the most economically significant crab fisheries along the Pacific coast of North America, valued for its sweet, tender meat, and it has become a major part of the region's commercial seafood industry and a signature export associated closely with the Pacific Northwest.
How is the Dungeness crab fishery kept sustainable?
Dungeness crab fisheries are typically managed under regulations covering minimum size limits, restrictions on harvesting females, and specific seasonal timing, rules generally designed to protect breeding females and allow young crabs to reach reproductive maturity before being caught, an approach credited with supporting a long-term sustainable harvest.
Why is a Dungeness crab vulnerable right after molting?
Immediately after molting its hard shell to grow larger, a Dungeness crab has a soft new shell that has not yet hardened, leaving it considerably more vulnerable to predators during that brief period, a general vulnerability shared broadly across crab species that must periodically shed their exoskeleton to increase in size.
What eats a Dungeness crab besides humans?
In addition to its commercial importance to people, the Dungeness crab serves as a significant food source for a range of natural predators, including various fish species, octopuses, and diving seabirds, making it an ecologically important part of the coastal Pacific food web beyond its role in the fishing industry.