gooseneck barnacle
noun
Definitions
Any of the species Pollicipes pollicipes 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, most of which are filter-feeders that attach to surfaces by a long stalk, though some are parasites.