Please help identify this crab

[karoljablonski]

Got 2 of those in my tank, they look like emerald crab but black. Thank you

 

[jbray84]

I would guess emerald crab. the end of the pincher looks like a scoop.

 

[LeslieH]

If you could scoop it out of the tank & take a pic from the top down it would be much easier to put a name on your crab. Side shots usually aren't that good for id.