pea crab definition

  • noun:
    • A crab for the genus Pinnotheres.
    • any tiny crab of genus Pinnotheres, residing as a commensal in bivalves; esp., the European species (Pinnotheres pisum) which life into the typical mussel in addition to cockle.
    • A crab for the genus Pinnotheres, inhabiting as a commensal the shells of various bivalve mollusks, as oysters. P.pisum is a good example. See Pinnotheriid√¶.
    • small soft-bodied crab living commensally in the mantles of certain bivalve mollusks

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