Specimen Information

Didemnum vexillum
Didemnum vexillum
(a colonial sea squirt)
Tunicates
Exotic

Specimen ID161015
GroupTunicates
GenusDidemnum
Speciesvexillum
Common Namea colonial sea squirt
StateWA
CountySnohomish
LocalityPuget Sound, Edmonds Underwater Park, Edmonds
Mapping AccuracyAccurate
HUC8 NamePuget Sound
HUC8 Number17110019
HUC10 NamePuget Sound
HUC10 Number1711001912
HUC12 NamePuget Sound
HUC12 Number171100191200
Map
Collection Day8
Collection Month10
Collection Year2004
Year AccuracyActual
Potential Pathwayshipping
Statuseradicated
Reference 1
Ref. Number:18741
Author:Puget Sound Action Team.
Date:2007
Title:Washington State's Response to an Invasion of Non-native Tunicates.
Publisher:Office of the Govenor, State of Washington.
Pages:29
CommentsRecreational divers found a 30-square ft growth of "colonial tunicate" in early October. On a sunken wooden boat. WDFW are working to eradicated the tunicate.
Record TypeLiterature
Earliest Recordlocale
Freshwater/MarineMarine


Disclaimer:

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 [1/21/2026].

Contact us if you are using data from this site for a publication to make sure the data are being used appropriately and for potential co-authorship if warranted.

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