OMG what is this giant crab I found? Pics inc

[Pulp Fishin]

When moving to my new house this week I caught a giant crab I've never seen before. Must have come in to my tank as a little guy a got big in hiding, since I caught him hes spent 4 days in a spare bucket with stagnant waters and hes still alive.
If anybody has an idea what this is and if hes safe to go into my tank or not, I'm guessing by the look of him hes not very safe.
Thanks

I'll call him ugly!

The underside as he curls up

A Ice Tea cap to show his size

He survived in the tank with a lionfish & puffer so he must be tough.

 

[ctenophors rule]

hes small.

wait, was he in a reef tank with a lionfish, and a puffer???????

i am sure your puffer fish would devoure her.

 

[Grunt]

"Gorilla crab"

 

[Pulp Fishin]

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

It looks like a gorilla crab doesn't it! lol

Okay first crab down in the pics is a Xanthid crab...from what I read they are no good! Glad he was in my fowlr because they cause trouble with corals.

Mabby I'll stick him in the QT with the puffer and watch the show down! Puffer vs crab that as big as the puffer is!


Who wnats to put bets down on the crab?