Crab ID

[Loggerhead]

I believe this is a female mithrax crab. Not green at all, almost purple so it is either covered in coraline or a red mithrax. Any ideas? It is from a small tank I am breaking down and the only two crabs I have ever added to it were a porcelain crab and a hermit, both of which are accounted for.

 

[reef lover]

Looks like one...ive seen them red before.