Is it a Good Witch or a Bad Witch?

[MyNemesis]

So this bad boy crawled out of a hunk of rock I was moving a couple of months ago and bit me. I was ****ed and I slam dunked him back into the tank, immediately regretting my demonstration of poor impulse control. Right after I did it I thought how stupid it was and I should have removed it. It looks like one of the bad guys, but I can't tell from the colors on the claws or anything. Nasty little bugger. Here's another shot:

Keep it or Kill it, or Put it in the Sump? Maybe I should start a poll!

[MizTanks]

Sump it!! Hairy legs, black tipped pinches = badness.

[thepanfish]

Try this little gem of a site I found this morning:
Crab Hitch Hikers

You can basically find all the common hitchiker crabs and it'll tell you whether to sump them or dump them.

Looks alot like a mithrax crab to me