oyster drill

Noun

• A type of sea snail, Urosalpinx cinerea (species) (and others in subfamily Ocenebrinae (subfamily), such as genera Urosalpinx (genus), Eupleura (genus), and Ocenebra (genus)), that uses an eversible gland to soften its prey's shell, and then drill a hole in the shell to consume the oyster or other shellfish.