Crab eating sps

part of a branch starts to white out and i saw a little crab looks to be having a good meal out of my sps. took it out and grab the little crab (he keeps hiding i use toothpick end up splitting it in half, the crab that is) o well its the crab or my sps. anyway will the white out part recovered?? or should i remove the white out part?

 

Many coral species have a specific type of crab that will live with in their branches in a symbiotic relationship the crab will fend off attackers on the coral by different predators like fish . But when In doubt yes get rid of them I had one yesterday in a coral that I had never seen and was not a 100% sure what type it was so on the floor it went..