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Orange Sheath Tunicate

Botrylloides violaceus


Botrylloides violaceus is considered an invasive species outside its native range (southern China to Japan and Siberia). It has a range of colors usually orange, yellow, red, purple or tan, and occasionally brown or lavender. It adheres tightly to a substrate and It often overgrows mussels, barnacles, encrusting bryozoans and solitary sea squirts.


Spotted near the bottom of a large jetty rock at Neah Bay, Washington.

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1 Comment

Tukup a year ago

Trying to figure out if a "tunicate" was a fungus, plant or animal. Good references. Wiki does an exceptional job explaining what they are. Interesting organisms. Thanks Brian.

Spotted by

Washington, USA

Spotted on May 19, 2019
Submitted on May 26, 2019

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