Invasive SpeciesAsian shore crab

Hemigrapsus sanguineus
FOUND by Science Pandas
Cape Elizabeth
ID Confirmed
Quality checked by Ms Fanning
Peer reviewed by Super Saucy Shore
Field Notes
It was a windy overcast morning with wet rocks in Cape Elizabeth's Kettle Cove. It was 60 degrees with wind speeds of 16-17 mph. It was a flood tide, which means that the tide is coming in. The rocks were covered in slippery algae that caused us to stumble. We were looking for the Asian Shore Crab beginning at 9:16 am on October 24. We knew Asian Shore Crabs are usually on the rocks in tide pools, so that's where we looked. We were looking for the Asian Shore Crab because we want to let other scientists around the world know about the problems this invasive species will continue to cause for native species as they spread.
Supporting Evidence
Photo of my evidence.
We think this is the Asian Shore Crab because it has a square shaped shell, which is a notable feature of the Asian Shore Crab. This is not the Green Crab because the Green Crab has a pentagon-shaped shell.
Photo of my evidence.
We think we found the Asian Shore Crab, because it has striped legs with white tips on the ends. This feature sets it apart from the Green Crab.
Photo of my evidence.
We think we found the Asian Shore Crab because it has three spines, which defines this as the Asian Shore Crab because no other crab has this feature.
Species Observation: Species Looked For
Did you find it?: 
I think I found it
Scientific name:
Hemigrapsus sanguineus
Common name:
Asian shore crab
Sampling method: 
Just looking around
Photo of our sampling method.
Place Studied
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Map this species
N 43.561301 °
W -70.218724 °
Observation Site Information
A photo of our study site.
Coastal - Rocky intertidal
Trip Information
Kettle Cove Moniz 2017
Trip date: 
Tue, 2017-10-24 09:30
Town or city: 
Cape Elizabeth
Type of investigation: 
Species Survey
Time of low tide: 
Fri, 2014-10-24 08:26


nice photos and explanations of key characteristics observed.

Well presented evidence and great photos!