Biodiversity & Conservation

MarLIN Glossary

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Barnacle
A group of crustaceans that live permanently attached to a substratum by the anterior potion of their head (Hayward et al., 1996). Two forms are typical. The goose barnacles hang from the substratum by a leathery stalk with the rest of the body protected (to varying degrees) by calcareous shell plates. The acorn barnacles are attached directly to the substratum and protected by tightly fitting calcareous shell plates.

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Glossary references