Hitchhiker Crab ID

[Shawn2122]

Found these guys living in my sump. I believe the first picture is a gorilla crab[bad for reef] and the second is a ruby mithrax crab[okay for reef?]

I was planning on keeping #2 in the sump refugium if that's okay? and giving away #1[if anyone wants]

Are my assumptions correct?

 

[ericrodriguez]

If they were leaving in your sump probably over a year with no problem, why take it out?
At least you have coral in the sump