Is this crab safe?

[Mxman38]

Found him on my monti

Thanks

 

[Calappidae]

Guessing here, but it looks like a mithrax or Xanthid. Both I would sump.

http://www.chucksaddiction.com/hitchcrabs.html

 

[GerritM]

Looks more like a Cymo sp. A better picture would be helpful.