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Ciona savignyi
Image courtesy of Melissa Frey, Royal BC Museum, Canada
Ciona savignyi
Taxonomic Group: Tunicates

Overview:

Ciona savignyi appears to be native to Japan and possibly offshore waters of Alaska and British Columbia.  Introduced populations were first reported on the West Coast of North America in 1985 at Long Beach Harbor, southern California. Since then it has been reported in a number of southern, central and northern California locations, including San Diego Bay, Santa Barbara Harbor, Monterey, Moss Landing, San Francisco Bay, Tamales Bay, Bodega Harbor, and Humboldt Bay. In 1998 it was found in Puget Sound near Seattle, Washington, and there are reports of extensive populations in several areas of Puget Sound and the northern reaches of the San Juan Islands. It is abundant in harbors and marinas and was likely spread through hull fouling on commericial and recreational boats. Despite its abundance in the fouling community, very little is known about its impacts, but it might compete with C. intestinalis, however, die-offs of both species due to environmental changes make this difficult to assess.

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Citation:

Fofonoff PW, Ruiz GM, Steves B, Simkanin C, & Carlton JT. .
National Exotic Marine and Estuarine Species Information System.
http://invasions.si.edu/nemesis/.
Access Date:



Marine Invasions Lab
Smithsonian Environmental Research Center

P.O. Box 28
647 Contees Wharf Road
Edgewater, MD 21037-0028 Tel: 443 482 2200
Fax: 443 482 2380
invasionsweb@si.edu


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