Native SpeciesJonah crab

Cancer borealis
NOT FOUND by The shrimp squad
Cape Elizabeth
ID Confirmed
Quality checked by Mrs. Moniz
Peer reviewed by Intertidal one
Field Notes
We went to Kettle Cove Beach to find the Cancer Borealis, commonly known as the Jonah Crab or Sleepy Crab. We looked for the native species on a cold, humid, foggy Fall day. You can smell blankets of seaweed sitting on damp rocks after a light rain storm. The boats were bobbing in the slow, rocking waves. Our method to find the species was looking around in the rocky intertidal zones of the beach. We searched under rocks, in submerged crevasses, and under seaweed. We were unable to find a Jonah crab. We were looking in shallower intertidal zones. Jonah Crabs usually live deeper out in the ocean. While we were unable to find the Jonah crab, we did find what we believe to be the native species called the Rock Crab. These are usually found more in the shallower intertidal zones.
Supporting Evidence
Photo of my evidence.
We believe that we found the Rock Crab because it is often found smaller in size in these shallow intertidal zones. This crab is smaller than 14 centimeters.
Photo of my evidence.
Another characteristic that leads us to believe that we found a Rock Crab, is the color of the shell. A Rock Crab is normally yellow to reddish-brown instead of purplish-brown like the Jonah Crab. The Rock Crab has little purple spots as pictured above.
Photo of my evidence.
We also believe we found a Rock Crab because it has much pointier claws than the Jonah Crab. The Jonah Crab has bulkier claws than the Rock Crab as pictured above.
Species Observation: Species Looked For
Did you find it?: 
I think I did not find it
Scientific name:
Cancer borealis
Common name:
Jonah crab
Sampling method: 
Just looking around
Photo of our sampling method.
Place Studied
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Map this species
N 43.561316 °
W -70.218724 °
Observation Site Information
A photo of our study site.
Coastal - Rocky intertidal
Trip Information
Kettle Cove Oct 2015
Trip date: 
Tue, 2015-10-20 07:40
Town or city: 
Cape Elizabeth
Type of investigation: 
Species Survey
Time of low tide: 


Those are some incredible photos.

I agree with Crab Lady, nice work ruling out the Jonah crab.

People often confuse the Jonah and rock crab so well done getting it right!