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Tenellia adspersa
Image courtesy of the United States Geological Survey
Tenellia adspersa
Taxonomic Group: Mollusks-Gastropods


Tenellia adspersa is a small nudibranch commonly known as the Miniature Aeolis and the Lagoon Sea-Slug. It was first described from Odessa, Ukraine and is native to the Eastern Atlantic and Western Mediterranean. It has been introduced to the West coast of North America, Japan, Brazil, and the Caspian Sea. Its population status (i.e. native or introduced) on the East coast of North America is unknown, due to confusion with a similar native nudibranch species. It has been reported from lagoons, estuaries, and harbors in warm-temperate to tropical regions and can be found on rocks, pilings, floating docks, and boat hulls. It is an important predator on a wide range of hydroid species. Some studies have shown that it may be a beneficial control species for hydroid fouling in power plant cooling systems.

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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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