Invasive SpeciesGreen crab

Carcinus maenas
FOUND by jupiter
ID Confirmed
Quality checked by Harmony Dawson
Peer reviewed by Brianna Rushlow
Field Notes
We found several small crabs and a couple of slightly larger ones that we identified using the species identification/information paper.
A sketch of our study site.
Supporting Evidence
Photo of my evidence.
The crab in the picture has 5 spines on each side. On the identification paper we read that the adult native species in Maine have more than 6 spines on each side, which is one thing that means we found green crabs.
Photo of my evidence.
All of the crabs we found didn't have square shaped shells, they were shaped like pentagons. On the identification paper we read that that is one of the things that means they were green crabs.
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 44.428000 °
W -69.003900 °
Observation Site Information
A photo of our study site.
Coastal - Rocky intertidal
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


Nice supporting evidence for your identification!