Guess that Crab

[zyrus]

Guess this crab
Hi guys,
Got a question but no picture I am sorry for that .
But here goes. I got a shipment of green star ployps in and at feeding time I happen to see in one of the small caves, a small (sorry) gross looking crab.
At first it look like a Emerald Mithrax Crab with out its shell.
Cause it was yellow/camel fleshy in color with fat rock arms with small pointed claws at the end of them and about the same size as a Emerald. Gross, Gross, Gross, Does anyone have a clue Will it grown to be fish killer "Gross Thousand?"
It jumps away if anything moves near but if I see it again I will get a picture. Gross.
:scared:

 

[capt.lunch]

I only know of one (and I am sure there are more) that kinda fits that description. "Neopetrolisthes" Porcelain Crab. They have a flat carapace and claws. They have a whitish, yellowish color with very tiny red spots that at a glance you can't see, but they make the color look more yellowish and fleshy. They are Reef safe and a filter feeder.