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Related to oyster crab: pea crab
A small crab (Zaops ostreum syn. Pinnotheres ostreum) of the western Atlantic Ocean that lives inside the shell of a bivalve mollusk, especially an oyster.
(Animals) any of several small soft-bodied crabs of the genus Pinnotheres, esp P. ostreum, that live as commensals in the mantles of oysters
any small, thin-shelled crab of the family Pinnotheridae: the female lives as a commensal in the gill cavity of bivalves.
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|Noun||1.||oyster crab - tiny soft-bodied crab living within the mantle cavity of oysters|
pea crab - tiny soft-bodied crab living commensally in the mantles of certain bivalve mollusks