Invasive SpeciesGreen crab

Carcinus maenas
FOUND by Gucciseagulls
Cape Elizabeth
ID Confirmed
Quality checked by Gucciseagulls
Peer reviewed by Flippin Oysters
Field Notes
Supporting Evidence
Photo of my evidence.
This crab has 5 spines which means it is an invasive species and the green crab is invasive it is also has claws with sharp tips and while the picture doesn't show it it was very aggressive.
Photo of my evidence.
This crab also had 5 spines this was smaller but it was still aggressive. We found this under a rock in a tidepool near the water. It had the same type of claws as the first crab sharp-tipped.
Photo of my evidence.
This crab was already dead when we found it, it was in this tidepool but it was pretty large. At least it was the largest we had found so far it had 5 spines and it had the same claws as the other two. We couldn't tell if it was aggressive because it was dead but we are pretty sure it's a green crab.
Species Observation: Species Looked For
Did you find it?: 
I think I found it
Scientific name:
Carcinus maenas
Common name:
Green crab
Sampling method: 
Just looking around
Photo of our sampling method.
Place Studied
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Map this species
N 43.561175 °
W -70.217571 °
Observation Site Information
A photo of our study site.
Coastal - Rocky intertidal
Trip Information
Kettle Cove
Trip date: 
Thu, 2018-10-25 08:45
Town or city: 
Cape Elizabeth
Type of investigation: 
Species Survey
Time of low tide: 


Yes, the 5 spikes on the carapace mean a green crab! Did you note the pentagon shape of the carapace too?