Invasive SpeciesSea potato

Colpomenia peregrina
FOUND by Potato Thieves
Cape Elizabeth
ID Confirmed
Quality checked by mr p
Peer reviewed by Tasty Beach Roses, Seaweed Searchers, Fabulous Roses
Field Notes
At Kettle Cove Cape Elizabeth, Maine on October 24th, 2017. The trip to Kettle Cove was made to collect data for the species. It was 9:30 a.m. and the tide was ebbing out to sea. High tide had been at 5:52 a.m. and low tide was going to be at 12:54p.m. It was a crisp overcast morning. Even with the 90% cloud cover, there was no precipitation. The water was a deep gray, covering the deep depths below. The air temperature was 60º F. The wind came from the south-east at 13 mph. The rocks were crawling with periwinkles. Not many people could find crabs. But the rocks were covered with seaweed. There was 1 dead crab at the bottom of a tide pool.
A sketch of our study site.
Supporting Evidence
Photo of my evidence.
The Sea Potato was found at Kettle Cove. It was found because it is very different from the Sea Cauliflower. The Sea Potato is very smooth and (photo on the left) where as the Sea Cauliflower (photo on the right) is more brainy and not as smooth.
Photo of my evidence.
Another piece of evidence is its delicate thin walls. This is not to be confused with the sea cauliflower or any other creature for that fact. The walls are paper thin. The sea cauliflower on the other hand, is clumpy and and has much thicker walls. The sea potatoes color is yellow brown to green. The sea cauliflowers color is a yellow brown to muddy brown. Though the color is similar due to the shape and on top of that the slight difference in color there was no trouble finding it.
Photo of my evidence.
The final piece of evidence is that the Sea Potato was connected to the seaweed, as it states on the sea potato Vital Signs ID sheet, the Sea Potato is epithetic. Epithetic means they grow on or attached to another organism. As you can see the Sea Potatoes are attached to the seaweed. Also, the photo shows some of them have collapsed which usually happens as it gets bigger. In conclusion, the Sea Potato was found at Kettle Cove beach, ME.
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 43.561208 °
W -70.218917 °
Observation Site Information
A photo of our study site.
Coastal - Rocky intertidal
Trip Information
Kettle Cove 2017
Trip date: 
Tue, 2017-10-24 09:00
Town or city: 
Cape Elizabeth
Type of investigation: 
Species Survey
Time of low tide: 
Tue, 2017-10-24 08:30
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