Asian shore crab
Hemigrapsus sanguineus
FOUND by B12 B2011-10-05
Falmouth
ID Questioned
Quality checked by
Peer reviewed by
Field Notes
I am happy because I found multiple Asian Shore Crabs. I see lots of rocks, I hear crashing waves, I smell salt water. I am surprised at how small the crabs were. I ran into no problems.
Supporting Evidence
The shell is squarish and it has three spines on each side
Dark dots all over shell
Dark and light bands on legs
Species Observation: Species Looked For
Did you find it?:
I think I found it
Scientific name:
Hemigrapsus sanguineusCommon name:
Asian shore crab
Is it alive?:
All alive
Count of individuals:
1-10
Coverage:
Between 1/2 and 3/4
Reproduction:
Eggs (animals)
How big is it?:
0 - 2 cm
Is it male or female?:
Can't tell
Sampling method:
Quadrat (user-placement)
Place Studied
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Map this species
Latitude:
N 43.732560 °
Longitude:
W -70.204400 °
Observation Site Information
Name:
B12 B's visit to Falmouth Town Landing
Habitat:
Coastal - Rocky intertidal
Trip Information
Name:
Eagles Falmouth Town Landing
Trip date:
Wed, 2011-10-05 10:15
Town or city:
Falmouth
Type of investigation:
Species and Habitat Survey
Ecosystem:
Coastal
Watershed:
Presumpscot
Sampling Method:
Dock
Just looking around
Quadrat (user-placement)
Nearest waterbody:
Casco Bay
Time of high tide AM:
Time of high tide PM:
Time of low tide AM:
Wed, 2011-10-05 12:30
Time of low tide PM:
Habitat Observations
Species diversity:
5 different species
Evidence of vectors:
Boat ramp
Boats
Paved road
People
Recent disturbance
Water temperature:
15.4°C
pH:
8.0
Dissolved oxygen:
8.9mg/L
Salinity:
31.4ppt
Comments
???
No one can really tell what we're looking at, and the drawing photo is blurry.
Hard to tell
I agree that your drawing and your notes suggest this is an Asian shore crab. It is also likely that you would find one in Falmouth. The photo is too blurry for me to confirm the ID.
why are you happy you found these??!
That's pretty rotten news from Falmouth! I'm really sad to hear that you think you found Asian Shore Crabs in Falmouth, Maine.
Your written evidence perfectly describes an Asian Shore Crab. I wish I could see the critter you took pictures of. Does your camera have a macro function that you could practice with? Macro mode helps you take really crisp pictures of really small things that you hold really close to your camera.
With a sighting as important as this, pictures are indeed "worth a thousand words"!
The Method picture you posted is interesting - I can see periwinkles and at least one type of seaweed. Neat photo. But it doesn't really help me understand how you followed your protocol. Ditto your Site Photo - last time I was there, the Falmouth Town Landing didn't look like a hand.
I'd really like to see your next data posting!