Please help me identify this
 

I found a tiny little crab about 1/4" in my acrapora today. I couldn't tell if it was just hanging out or picking at it so I pulled him out and he is floating in a ziplock in my sump. He has a white claws with red tips. The head is black then fades to a red body and rear legs.the photo should be attached to this post as well. Thanks

Yup, definitely a crab :) Differing opinions on crabs. Me, I'd put it back and watch to see if it did anything bad before removing it.

+1

Looks like one of the common acro crabs.

He guards your coral....

Yeah, he looks like an Acro crab to me too. Probably Trapezia sp. Sometimes they will damage the flesh of the Acro in the immediate area that they habitate, but they are pretty cool to just let be. :) If you have wrasses though, he probably won't last long.