Help id'ing a crab.

[Nano Chris]

Couldnt get a better image yet, I was going to take him out and put him in the fuge, should i? Or do you think hes reef safe? I jus have lr in the tank now and sand, ill be adding more lr soon.
http://www.justuploadit.com/files/1/Reef%20Tank/5818.jpg

http://www.justuploadit.com/files/1/Reef%20Tank/8818.jpg

http://www.justuploadit.com/files/1/Reef%20Tank/26292.jpg

[Blown 346]

I would get it out and into the sump or fuge.
If you arent 100% sure on anything that pops up in your tank, I would remove it until you know.

98% of the time, any crab the comes about is one you dont want.

[Farrmanchu]

Looks like a Mythrax of some sort. Maybe Emerald.