Invasive SpeciesSea potato

Colpomenia peregrina
FOUND by Modern Starfish 16
Cape Elizabeth
ID Confirmed
Quality checked by Mrs. Moniz and Mr. Perly
Peer reviewed by Kettle Kove Kelp Club
Field Notes
I was hit with a strong cold wind, which whistled by my ears. This crisp fall morning at Kettle Cove Beach, the sun was entirely covered by the clouds. There were moored boats bobbing with the waves. I heard the ebbing tide lapping on the beach, and strongly smelled the salty sea. On either side of the beach, there were tidepools, which held many different species. Kids started screaming, and swarmed the beach. There was also a light fog coming in towards the beach from the ocean. Crabs scuttled all over the rocks, which were also covered in seaweed, and in the full tidepools. I was worried my partner and I wouldn’t be able to find the Sea Potato which we were tasked with finding. I had been to this beach before, and I didn’t remember seeing any. But since I knew where and what to look for, my partner and I found it easily, and had fun looking for it.
Supporting Evidence
Photo of my evidence.
In the picture above you can see characteristics of the Sea Potato. Common characteristics of the Sea Potato are thin skin, which is almost translucent. We know it is the Sea Potato, because this is unlike the similar species Sea Cauliflower, which has thick walls.
Photo of my evidence.
In the picture above is a sea potato that shows characteristics of the organism. It’s color is tan, and it is hollow with a liquid inside. This is different from the brown and yellow brainlike Sea Cauliflower, which is a similar species.
Photo of my evidence.
In the picture above you can see the size of the sea potato. The Sea Potato’s common size range is 1 to 7 cm. The Sea Potato in the photo is 4 cm. We know it isn’t the Sea Cauliflower, since it’s length range is about 5 cm and below.
Species Observation: Species Looked For
Did you find it?: 
I think I found it
Scientific name:
Colpomenia peregrina
Common name:
Sea potato
Sampling method: 
Just looking around
Photo of our sampling method.
Place Studied
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Map this species
N 43.561100 °
W -70.217500 °
Observation Site Information
A photo of our study site.
Coastal - Rocky intertidal
Trip Information
Kettle Cove
Trip date: 
Tue, 2017-10-24 09:30
Town or city: 
Cape Elizabeth
Type of investigation: 
Species Survey
Time of low tide: 
Tue, 2017-10-24 08:26
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