Invasive SpeciesEuropean shore crab

Carcinus maenas
FOUND by comet
ID Confirmed
Quality checked by Joshua C
Peer reviewed by
Field Notes
We are happy because we were successful in finding green crabs. We could smell, hear, and see the ocean. Along with this, we could see seaweed, shells, and rocks. We were surprised because we didn't find as many crabs as we thought we would. Some problems we ran into were actually locating and finding the crabs.
A sketch of our study site.
Supporting Evidence
Photo of my evidence.
We found a small crab meeting the requirements of a green crab. It was brown and green, and had a pentagon shaped shell.
Photo of my evidence.
Others in our class were able to find crabs that met these standards.
Photo of my evidence.
We are in a known area of this invasive species.
Species Observation: Species Looked For
Did you find it?: 
I think I found it
Scientific name:
Carcinus maenas
Common name:
European shore crab
Sampling method: 
Just looking around
Photo of our sampling method.
Place Studied
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Map this species
N 44.428500 °
W -69.003900 °
Observation Site Information
A photo of our study site.
Coastal - Beach or dune
Trip Information
Belfast Maine Boat Waterfront II
Trip date: 
Thu, 2016-12-08 13:22
Town or city: 
Type of investigation: 
Species Survey
Time of low tide: 
Thu, 2016-12-08 11:06


Grate find and amazing pictures!

Nice job id'ing your crab, comet! Another good characteristic is the number of spines on each side of the carapace (shell). I LOVE that you drew the quarter for scale in your field notes - well done!