Invasive SpeciesSea potato

Colpomenia peregrina
FOUND by ShoreSeePotatoes
Cape Elizabeth
ID Confirmed
Quality checked by Mrs. Moniz
Peer reviewed by The weird man
Field Notes
Kettle Cove beach smelled of salty air and seaweed, and the bite of salt was evident. The beach had an expanse of ocean past the sand, rocks, and seaweed. Big rocks and ocean bordered the beach. The wind that came in strong gusts made it chilly and hard to take photos of the specimens throughout the trip. The ocean waves crashing were heard along the beach and in the parking lot. It was a windy and wet day to look for the species. The clouds were a murky grayish color covering about 90% of the sky with only holes of sun peeking through. The air felt slightly damp. The tide was coming in, which made it a flood tide. The habitat was sandy, rocky intertidal, beach, seaweed, with low wave action. The Sea Potato was found in abundance on seaweed. There were no difficulties or challenges.
Supporting Evidence
Photo of my evidence.
The species that we found was the Sea Potato. It had very thin walls and a hollow interior. It was also papery, and almost see-through, which are characteristics of the Sea Potato. It is not the Sea Cauliflower because the Sea Cauliflower has thick walls, and it is gelatinous.
Photo of my evidence.
The species we found was Colpomenia Peregrina, or commonly known as the Sea Potato. It shared the same characteristics with the Sea Potato, such as an olive color that can range from yellow to green to brown. It is not a Sea Cauliflower because Sea Cauliflowers are dark yellow to muddy brown, and the specimen collected was more olive, like the Sea Potato.
Photo of my evidence.
The species found was the Sea Potato. The Sea Potato sometimes connects to other species of algae, just like one of our specimens did. Also, as they grow larger, the Colpomenia Peregrina can collapse in upon itself, which our specimen did. This species is not Sea Cauliflower because Sea Cauliflower cannot collapse upon itself, and it is connected to rocks, not seaweed.
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 - Beach or dune
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


Nice photos and supporting evidence for your find!