gooseneck barnacle

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun Any of several filter-feeding crustaceans, of the genus Lapas, that live attached to hard surfaces of rocks and flotsam in the ocean intertidal zone. It has a long and muscular stalk, which is edible and is considered a delicacy in several Mediterranean countries.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun stalked barnacle that attaches to ship bottoms or floating timbers