This species can be identified thanks to the organization of its zooids into rows. each individual has one incurrent siphon, and those tend to be organized in parallel rows or elongated ovals.
The colonies start flat, and eventually acquire lobes. The color varies from almost black to bright yellow. orange is the most common color. Colonies are a few square feet in area, and grow easily on everything from PVC to steel and ropes. Marine vomit (Didemnum vexillum), in contrast, generally does not appear to thrive on PVC or steel in our region.
- WoRMS Page for Botrylloides violaceus
- Search Arctos Database for Botrylloides violaceus (Southeast only)
- Search Arctos Database for Botrylloides violaceus (entire database)
- Encyclopedia of Life search for Botrylloides violaceus
- iNaturalist Observations for Botrylloides violaceus in Southeast Alaska