Hitch hiker crab ID

[grapejelly]

anyone know if this crab is bad or not and what kind he is?
he comes out at night...I wonder if he goes after my fish while they are snoozing...sometime there tails can look all bit up...
I used to have 3 stone crabs hitchers and I got them all out...but this one I just noticed the other evening...tonight i found his hollow body and got these pics... i am hoping someone can give me some insight on this one....I went to chucks addiction to see if his illastrations could help me identify

http://chucksaddiction.com/hitchcrabs.html
but could not come to a conclusion....

any info on this would be great...

 

[DoctaQ]

looks like a porcelean type

 

[s_kelley]

Thought pointy claws were a bad thing.

 

[Takara]

looks like a porcelean type

x2 especially with those sweepers

 

[Jocko]

Wow that is a cool looking porcelain crab. The tips are slightly pointier than the ones I had come in on my gulf of mexico rock. But still looks like a porcelain with those wider flatter "arms." I loved mine. It was always funny to watch them punch hermit crabs that got too close.

Amazing color though. So is that a molt?

 

[APISTOBORELLI]

Look at the eyes on the top of the carapace, they stare right through you.