Albino/white crab ?

Tonight we discovered we have a small white crab in the tank. We have never seen it in the tank before, as even in daytime we can usually find where are 2 Emerald crabs are hiding. Are there albino crabs? or what technical name is a white crab.

 

Does it look like an emerald, becuae they do come in white.

 

Does it look fuzzy with Sharp front pinchers ? If so its teddy bear crab, not safe.

 

I've seen my emeralds pretty much turn white.

 

It does not look fuzzy to be a teddy bear crab.

We had 2 small green Emerald crabs and 1 larger green Emerald crab but lately I have only been able to find 1 of the small crabs so perhaps it turned white.

 

If it looks like an emerald as far as body shape, it probably is an emerald.

 

I have one thats red/maroon lol