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Ligia oceanica
Image courtesy of Gilles San Martin and Wikimedia commons through the CC BY-SA 3.0 License
Ligia oceanica
Taxonomic Group: Crustaceans-Isopods


Ligia oceanica is a fast-running semi-terrestrial isopod commonly known as the Sea Slater. It is native to the Northeast Atlantic from Norway to Morocco and the western Baltic. It is introduced in the Northwest Atlantic from Maine to Massachusetts, and the Azores and Canary Islands. It is found on rocky shorelines, wharf pilings, and harbor areas where it inhabits the borders of the land and sea. It is a herbivore and scavenger in the intertidal zone in Europe, but appears to be rare in North America and has no reported ecological or economic impacts.

* 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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