Specimen Information

Botrylloides violaceus
Botrylloides violaceus
(an orange sheath tunicate)
Tunicates
Exotic

Specimen ID267736
GroupTunicates
GenusBotrylloides
Speciesviolaceus
Common Namean orange sheath tunicate
StateOR
CountyDouglas
LocalityWinchester Bay, south side of the mouth of the Umpqua River, the site known as The Triangle
Mapping AccuracyAccurate
HUC8 NameUmpqua
HUC8 Number17100303
HUC10 NameNorth Cove-Pacific Ocean
HUC10 Number1710030308
HUC12 NameNorth Cove-Pacific Ocean
HUC12 Number171003030803
Map
Collection Day10
Collection Month2
Collection Year2010
Year AccuracyActual
Potential Pathwayhitch hiker with oysters
Statusestablished
CommentsIdentification confirmed from photos by Dr. Thomas Therriault, Fisheries and Oceans Canada and by Dr. James Carlton, Williams College MA. Dr. Carlton also relates he visited Winchester Bay in 1988 and identified the tunicate then as well.
Record TypePersonal communication
VerifierDr. Thomas Therriault, Dr. James Carlton
Freshwater/MarineMarine-Brackish
Photo
Botrylloides violaceus
Botrylloides violaceus
Botrylloides violaceus
Botrylloides violaceus


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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 [1/23/2026].

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