Tiny crab on acro !

[nelix10]

I am wondering if this could be a baby from my 2 emerald crabs or just a hitch hiker?

 

[bribo12]

Possibly an acro crab. They have a commensal relationship with acropora and help defend it from pests while the acro gives the crab shelter. The pic is hard to tell though

 

[Sniperhank]

Does it look like this?
Saltwater Aquarium Inverts for Marine Reef Aquariums: Trapezia Pocillopora/Acropora Crab

 

[nelix10]

No it is white and maybe furry! I think you are right it is an acro crab, looks like they come in a variety of colours!