Paracerceis sculpta is a species of marine isopod between 1.3 millimetres (0.05 in) and 10.3 mm (0.41 in) in length. The species lives mainly in the intertidal zone, and is native to the Northeast Pacific from Southern California to Mexico, but has since been introduced to many other countries. Adults are herbivorous and consume algae but juveniles are carnivorous and consume moulting females. They reproduce in sponges but do not feed near them.

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