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Caulacanthus okamurae
Image courtesy of Jymm via Wikimedia Commons and the GNU Free Documentation License
Caulacanthus okamurae
Taxonomic Group: Algae


Caulacanthus okamurae is a small red alga, native to Asia and the Indo-Pacific. Introduced populations are known from Europe and the West Coast of North America. It is a turf-forming algae that grows in dense aggregations in the mid-to-upper intertidal zone of exposed rocky coasts and more sheltered areas. In California, introduced populations were shown to decrease the number of gastropods and barnacles, but in turn, increased the number of algae, copepods and ostracods.

* Content for this species is based on the literature and peer review is pending - if you have comments or feedback please contact Paul Fofonoff at

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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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