Hitchhiker identification

[freybizzy]

So I finally began setting up my 5.5 gallon tank today, and it looks like this guy was hiding out in some of the liverock I bought. Anybody know what it is? And is there any chance it'll survive through cycling?

 

[Frankie_Garcia]

Type of like emerald crap

 

[freybizzy]

Those don't get too big for a 5.5 do they?

 

[BigRedsReefs10]

Kind of looks like a gorilla crab

 

[Macscale]

Yeah... It does resemble a gorilla crab.. I'd get it out of there, now.