id of unknown crab please

[Kx03]

this guy is living in my sump for a week or two

[ihavecrabs]

It's hard to tell with those pictures.  From the back legs looks like it maybe a type of Portunidae crab ( Swimming Crab) or paddle crab.  Hopefully this may point you in the right direction to do some research.

[Vincenzo.]

Badd. Toss