ID these 3 crabs please

[eferna]

Can someone ID these 3 Crabs for me. I'm thinking a gorilla, but not sure..these f@#$%!s gave me a hard time

I finally made my own tweezers out of hanger and chased the guys out of their holes, boy were they tough to catch.

 

[LeslieH]

They look like Mithrax or some other relatives of emerald crabs.

 

[eferna]

so are they good or bad??? I saw one in my polps sitting in there so i removed him

 

[jhildebrand]

probably not bothering the polyps, but by the looks of those claws i wouldn't risk 'em. there's always someone that'll take them though if you don't have a sump they can live in.