any of several tiny crabs of the family Pinnotheridae, the female of which lives as a commensal in the shells of bivalve mollusks.
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Origin of pea crab
First recorded in 1830–40
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Examples from the Web for pea crab
When the pea-crab discovers a supply of food he brings it to his friend, the Pinna, to be divided equally.Digby Heathcote|W.H.G. Kingston
Inquiline, in′kwi-lin, adj. living in the abode of another, as a pea-crab in an oyster-shell.
any of various globular soft-bodied crabs of the genus Pinnotheres and related genera that live commensally in the mantles of certain bivalves
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012