Invasive SpeciesOrange sheath tunicate

Botrylloides violaceus
FOUND by turningtunicate
South Portland
ID Questioned
Quality checked by Runningpanda
Peer reviewed by
Field Notes
We were there to look for tunicates as part of an invasive species survey. We observed the tunicates on the sides of the docks.
Supporting Evidence
Photo of my evidence.
It is orange and has a similar gelatinous texture as the species shown in the photo. Furthermore, they are in a cluster and are arranged in loose circles.
Photo of my evidence.
Same as written evidence #1
Species Observation: Species Looked For
Did you find it?: 
I think I found it
Scientific name:
Botrylloides violaceus
Common name:
Orange sheath tunicate
Sampling method: 
Just looking around
Photo of our sampling method.
Place Studied
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Map this species
N 43.650043 °
W -70.230789 °
Observation Site Information
A photo of our study site.
Coastal - Dock
Trip Information
Port Harbor Marine 2017
Trip date: 
Fri, 2017-06-30 09:42
Town or city: 
South Portland
Type of investigation: 
Species Survey
Time of low tide: 
Fri, 2017-06-30 10:47


Judging from the photos, it looks like you have 2 different colonial tunicates. One of them (the bottom photo) is Botrylloides, but the top one looks suspiciously like a Botryllus schlosseri or a different type of Botrylloides.