- barnacle, cerriped, cerripede - marine crustaceans with feathery food-catching appendages; free-swimming as larvae; as adults form a hard shell and live attached to submerged surfaces
--1 is a kind of crustacean
--1 is a member of Cirripedia, subclass Cirripedia
--1 has particulars:acorn barnacle, rock barnacle, Balanus balanoides; goose barnacle, gooseneck barnacle, Lepas fascicularis