Invasive SpeciesAsian shore crab

Hemigrapsus sanguineus
NOT FOUND by crabs2017
ID Confirmed
Quality checked by P.B
Peer reviewed by S.J, I.M, S.O, S.T, E.H, J.T, A.M.T, D.S, L.H, V.Y,
Field Notes
This is the 11th year the JFDS school has gone to Moose Point to conduct a survey. In the 11 years we have gone, we have only found green crabs in the intertidal zone. It was a cold, and foggy day, and we found a total of 406 crabs. 48 of the crabs were female, and 358 crabs were male. We had a total of 12 transects, with about 5-6 students in each transect. The transects were 10 M x 2 M. We found ore crabs under seaweed, than under rocks. The JFDS has yet to find an Asian shore crab.
A sketch of our study site.
Supporting Evidence
Photo of my evidence.
Looking at the legs of this crab, it doesn't have light and dark colored bands. This does not have the light and dark banding like the Asian Shore Crab has.
Photo of my evidence.
Looking at the shape of the carapace, this crab's shape is like a pentagon. This does not have the square carapace like the Asian Shore Crab.
Photo of my evidence.
Looking at number of spines on each side of the carapace, there are 5. This does not have 3 spines like the Asian Shore Crabs does.
Species Observation: Species Looked For
Did you find it?: 
I think I did not find it
Scientific name:
Hemigrapsus sanguineus
Common name:
Asian shore crab
Sampling method: 
Photo of our sampling method.
Place Studied
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Map this species
N 44.431930 °
W -68.942500 °
Observation Site Information
A photo of our study site.
Coastal - Rocky intertidal
Trip Information
Trip date: 
Wed, 2017-09-27 09:10
Town or city: 
Type of investigation: 
Species and Habitat Survey
Eastern Coastal
Time of low tide: 
Wed, 2017-09-27 21:50
Habitat Observations
Species diversity: 
1 different species
Evidence of vectors: 
Paved road
Walking trail
Water temperature: 
Dissolved oxygen: 


You did a very nice job with your written and visual evidence. Well done!

Hi Crabs2017,

This is a beautiful observation with great photos and detailed evidence. I am not sure about your coordinates, though. It looks like you were looking for Asian shore crabs in the ocean. If you respond to this comment with the correct coordinates, we will get you right back on track. Thanks!

~The VS Team

Good Morning,
Sorry about our coordinates being off. Not sure what happened. Let"s try these: Latitude: N 44.43193 and then Longitude: W -68.94250

That looks much better. Thank you!

~The VS team