Invasive SpeciesAsian shore crab

Hemigrapsus sanguineus
NOT FOUND by P34
2013-05-28
Yarmouth
ID Confirmed
Quality checked by P34
Peer reviewed by P32
Field Notes
I am happy because the invasive Asian crabs were not represented in the quadrat. I see seaweed, crabs, a lot of barnacles, and periwinkles. I hear the ocean and seagulls. I smell salt water and rotting sea food. I am surprised we found so many invasive crabs and no native crabs. We had difficulty finding a location representing crabs, periwinkles, and green fleece.
A sketch of our study site.
Supporting Evidence
Photo of my evidence.
All crabs found were identified as green crabs, and all of the seaweed was entirely combed through. Any baby crabs found were not identified due to the characteristics of the juvenile phases.
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: 
Quadrat (user-placement)
Photo of our sampling method.
Place Studied
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Map this species
Latitude: 
N 43.771572 °
Longitude: 
W -70.164619 °
Observation Site Information
A photo of our study site.
Habitat: 
Coastal - Rocky intertidal
Trip Information
Name:
Old Town Landing
Trip date: 
Tue, 2013-05-28 08:15
Town or city: 
Yarmouth
Type of investigation: 
Species and Habitat Survey
Ecosystem: 
Coastal
Watershed: 
Casco Bay
Time of low tide: 
Tue, 2013-05-28 08:22
Habitat Observations
Species diversity: 
8 different species
Evidence of vectors: 
Boats
Paved road
Dirt road
People
Water temperature: 
pH: 
Dissolved oxygen: 
Salinity: 

Comments

Thanks for your reply. Good luck ID'ing the little guys!

Good work - these are green crabs! You can actually identify the tiny ones if you use your fingernail to check for the 5 spines near the eye.

Also, I really liked your sketch!

I agree with Crab Lady that this is an excellent sketch. I'll get it on the Best Sketches page soon!
http://vitalsignsme.org/best-sketches

Thank you for your comment! Next time we will attempt to identify the small ones by using your idea.