cowrie, any of several marine snails of the subclass Prosobranchia (class Gastropoda) comprising the genus Cypraea, family Cypraeidae. The humped, thick shell is beautifully coloured (often speckled) and glossy; the apertural lips, which open into the first whorl in the shell, are inrolled and may be fine-toothed.
Cowries occur chiefly in coastal waters of the Indian and Pacific oceans. The 10-centimetre (4-inch) golden cowrie (C. aurantium) was traditionally worn by royalty in Pacific Islands, and the money cowrie (C. moneta), a 2.5-centimetre (1-inch) yellow species, has served as currency in Africa and elsewhere.