Invasive SpeciesGreen crab

Carcinus maenas
FOUND by Elmoseaweed
Cape Elizabeth
ID Confirmed
Quality checked by gabe
Peer reviewed by Kevin
Field Notes
We were happy because we got to go outside and enjoy the fresh air and the ocean when we were crabbing. my partner scraped his finger when we were crabbing that wasn't good. Also, the day we went was really cold and windy which didn't help our crabbing mission because the water was freezing. when we were crabbing we got to enjoy the views of the water and Richmond Island. we also smelled the disgusting smell of seaweed. I was not surprised that I found the green crabs, there were tons of them.
A sketch of our study site.
Supporting Evidence
Photo of my evidence.
the specie green crabs are green. the crabs we found were green, so that's one reason why we think we have identified a green crab.
Photo of my evidence.
All invasive spices of crab have 3-5 notches on each side of their shell, which includes green crabs. As you can see this crab in the picture has 4 notes on its shell, which means it could be a green crab.
Photo of my evidence.
green crabs have unusually long legs compared to other crabs. the crab we found has long legs as seen in the picture.
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 43.561339 °
W -70.218920 °
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: 


You identified the crab correctly, but need to count the spines one more time!