Specimen Information

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

Specimen ID252632
GroupTunicates
GenusDidemnum
Speciesvexillum
Common Namea colonial sea squirt
StateMA
CountyEssex
LocalitySandy Bay [Atlantic Ocean] in Rockport
Mapping AccuracyAccurate
HUC8 NameCharles
HUC8 Number01090001
HUC10 NameEssex River-Frontal Ipswich Bay
HUC10 Number0109000103
HUC12 NameSandy Bay-Atlantic Ocean
HUC12 Number010900010305
Map
Collection Day18
Collection Month6
Collection Year2006
Year AccuracyActual
Potential Pathwayunknown
Statusestablished
Reference 1
Ref. Number:24162
Author:USGS - Woods Hole Science Center.
Date:2008
Title:Marine Nuisance Species, Didemnum, a colonial tunicate; ascidian; sea squirt - New England Coast Location Table.
Comments<5 ft depth; on rocky seabed
Record TypeLiterature
Freshwater/MarineMarine


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Citation information: U.S. Geological Survey. [2026]. Nonindigenous Aquatic Species Database. Gainesville, Florida. Accessed [2/2/2026].

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