Stalked barnacle that attaches to ship bottoms or floating timbers WordNet 3.0 & Open English WordNet

Goose barnacles, also called stalked barnacles or gooseneck barnacles, are filter-feeding crustaceans that live attached to hard surfaces of rocks and flotsam in the ocean intertidal zone. Wikipedia

Dosima is a genus of goose barnacles in the family Lepadidae. Wikipedia

A species of crustacean Wikipedia Disambiguation

Genus of crustaceans Wikidata

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. Wiktionary

Pollicipes pollicipes. Wiktionary (translation)