gooseneck barnacle

Noun

• Any of the species Pollicipes pollicipes (species) or its close relatives, filter-feeding crustaceans that live attached to hard surfaces of rocks and flotsam in the ocean intertidal zone, with a long and muscular stalk, which is edible and considered a delicacy in several Mediterranean countries.
• Any barnacle in the order Pedunculata (order), most of which are filter-feeders that attach to surfaces by a long stalk, though some are parasites.