0 a type of large crab (= a sea creature with five pairs of legs and a round, flat body covered by a shell) that lives on the Atlantic coast of North America and is eaten as food:
For hundreds of years the residents have earned their livelihoods from catching oysters and blue crabs.
Surveys show that the bay's blue crab population has reached its lowest point in 30 years.
The blue crab harvest is a large portion of the commercial watermen's income.
