Invasive SpeciesAsian shore crab

Hemigrapsus sanguineus
FOUND by stripedstripers
2014-10-28
Cape Elizabeth Maine
ID Confirmed
Quality checked by Pp
Peer reviewed by Cp
Field Notes
WE went to Cresent Beach, it is located at 43.561939 lat, and -70.219818 long. it was cold, wet and misty. we heard people talking. We smelled seaweed, And we saw the rocky beach. Some problems that we ran into were that there were big rocks that we couldn't pick up. there was also a lot of slippery seaweed. We were surprised that our group found so many crabs so fast.
A sketch of our study site.
Supporting Evidence
Photo of my evidence.
In this is a picture you can see the crab has very large claws. We thought that this was a good picture to use because it shows the two large front claws that identify the crab. The vital signs ID cards states that the crab has two front claws with speckles, sometime the claws are reddish brown. This is unlike a green crab because they don't have pointed claws.
Photo of my evidence.
I know that this is the Asian Shore crab because on the Vital Signs sheet they say the crabs have dark colored bands on the legs. This picture shows that crab does have colored bands on the legs. We know that it's not a green carb because green crabs have all green legs.
Photo of my evidence.
In the picture it show that the crab has a square shell and four legs, if you look closely you can see there are small orange tips that are very sharp, on the end of the side claws. On the Vital Signs ID sheet it talks about the 4cm squard shell. You can also see there are 3 ridges on the side of the crab, that is how I know it's not a Green Crab because the Green Crab has 5 ridges.
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
Latitude: 
N 43.561939 °
Longitude: 
W -70.219818 °
Observation Site Information
A photo of our study site.
Habitat: 
Coastal - Rocky intertidal
Trip Information
Name:
Kettle Cove (CEMS 7th Grade)
Trip date: 
Tue, 2014-10-28 09:22
Town or city: 
Cape Elizabeth Maine
Type of investigation: 
Species Survey
Ecosystem: 
Coastal
Watershed: 
Presumpscot
Time of low tide: 
Tue, 2014-10-28 08:25

Comments

Photos are a little blurry, but this is indeed an Asian shore crab!