Didemnum vexillum
Didemnum vexillum
(a colonial sea squirt)
Tunicates
Exotic
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22 results for Didemnum vexillum (a colonial sea squirt)
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Specimen IDStateCountyLocalityYear HUC Number What's this? Drainage nameStatus
272577 AKSitkaPacific Ocean, at Whiting Harbor in Sitka Sound2010 19010212 Baranof Islandestablished
623705 CAAlamedaBallena Bay2010 18050004 San Francisco Bayestablished
623707 CAAlamedaDumbarton Bridge2010 18050004 San Francisco Bayestablished
623674 CAAlamedaPort of Oakland Office2010 18050004 San Francisco Bayestablished
623703 CAContra CostaChevron Pier2010 18050002 San Pablo Bayestablished
623677 CAMarinAyala Cove2010 18050002 San Pablo Bayestablished
623689 CAMarinCorinthian Marina2010 18050002 San Pablo Bayestablished
623685 CAMarinParadise Cay2010 18050002 San Pablo Bayestablished
623683 CAMarinRichardson Bay2010 18050002 San Pablo Bayestablished
623688 CASan FranciscoCruise Ship Pier2010 18050002 San Pablo Bayestablished
623687 CASan FranciscoFerry Terminal Pier2010 18050002 San Pablo Bayestablished
623684 CASan FranciscoPier 452010 18050002 San Pablo Bayestablished
623682 CASan FranciscoPotrero Point2010 18050004 San Francisco Bayestablished
623681 CASan FranciscoSaint Francis Yacht Harbor2010 18050002 San Pablo Bayestablished
623675 CASan FranciscoTreasure Island2010 18050002 San Pablo Bayestablished
623686 CASan MateoCoyote Point Marina2010 18050004 San Francisco Bayestablished
623706 CASan MateoRedwood Creek - Marina2010 18050004 San Francisco Bayestablished
623704 CASan MateoRedwood Creek - Shipping2010 18050004 San Francisco Bayestablished
623690 CASan MateoSan Mateo Bridge2010 18050004 San Francisco Bayestablished
269579 ORCoosCoos Bay, Charleston Boat Basin2010 17100304 Coosestablished
267222 ORDouglasWinchester Bay [near Reedsport]2010 17100303 Umpquaestablished
275257 WAKingPuget Sound, Shilshole, northern entrance, Seaview Avenue Pier.2010 17110019 Puget Soundestablished

Data Disclaimer: Number of records does not imply species abundance. This summary represent collection records only and may not reflect the actual distribution of established populations. These data are preliminary or provisional and are subject to revision. They are being provided to meet the need for timely best science. The data have not received final approval by the U.S. Geological Survey (USGS) and are provided on the condition that neither the USGS nor the U.S. Government shall be held liable for any damages resulting from the authorized or unauthorized use of the data.

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The data represented on this site vary in accuracy, scale, completeness, extent of coverage and origin. It is the user's responsibility to use these data consistent with their intended purpose and within stated limitations. We highly recommend reviewing metadata files prior to interpreting these data.

Citation information: U.S. Geological Survey. [2026]. Nonindigenous Aquatic Species Database. Gainesville, Florida. Accessed [5/24/2026].

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For general information and questions about the database, contact Wesley Daniel. For problems and technical issues, contact Matthew Neilson.