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Limnoithona tetraspina
Image courtesy of Jeffery R. Cordell, University of Washington
Limnoithona tetraspina
Taxonomic Group: Crustaceans-Copepods


Limnoithona tetraspina is a cyclopoid copepod species. It was described from the Yangtze River Delta, China, but its full distribution in Asia is unknown. Introduced populations are known from the Pacific coast of North America and Iraq. In 1993, it was found in San Francisco Bay, California where it quickly replaced another non-native copepod, L. sinensis. It is also known from the Columbia River, Oregon and Grays River, Washington. It is characteristic of estuarine waters and appears to be able to tolerate a greater range of salinities than the congeneric L. sinensis. Few impacts have been reported from introduced locations, but this species might adversely affect larval fish by replacing larger native copepod species.

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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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