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Amphibalanus amphitrite
Image courtesy of Melissa Frey, Royal BC Museum
Amphibalanus amphitrite
Taxonomic Group: Crustaceans-Barnacles


The striped acorn barnacle, Amphibalanus amphitrite, was first described by Darwin in 1854. Its native range is difficult to determine because it is part of a complex of similar species and prone to transport on ships' hulls. It may be native throughout the West Pacific and Indian Oceans from Southeastern Africa to Southern China. It has been introduced to the Eastern Pacific (Panama-California), Northwestern Pacific (Korea-Japan-Russia), Southwestern Pacific (including New Zealand and possibly Southern Australia), Pacific Islands (Hawaii), Western Atlantic (Caribbean-Long Island Sound), and Northeastern Atlantic (Germany-England-France).  Amphibalanus amphitrite is a frequent fouling organism and can grow on a wide range of hard surfaces, including docks, ships' hulls, logs, mangroves, rocks and bivalve shells.

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Fofonoff PW, Ruiz GM, Steves B, Simkanin C, & Carlton JT (2018)
National Exotic Marine and Estuarine Species Information System.
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Marine Invasions Lab
Smithsonian Environmental Research Center

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