Urosalpinx cinerea

Urosalpinx cinerea, common name the eastern or Atlantic oyster drill, is a species of small predatory sea snail, a marine gastropod mollusk in the family Muricidae, the murexes or rock snails.

They use chemoreception in their environment and are found to be sessile and encrusting organisms. Microscopic particles released by prey are carried through the sea water and captured by the Atlantic Oyster Drill. This animal is not physically able to close itself from its surrounding environment because of its siphonal canal.