Hitchhiker on/in Cup Coral

Now I know what the coral is, what I should do with it and the purpose of it's shedding, I have a NEW question! Last night I was feeding with zooplankton (bottled) and noticed that there is something embedded in the coral that when I spot fed with a baster wiggled, had very tiny claws and some type of mouth. It almost looks like some type of bug? It is very blue in color, and I checked with a flashlight several times during the night but it did not actually come out of the coral.

I have a photo, but don't know if you can tell anything from it. Any suggestions? Don't know if it will hurt the coral or I should just leave it be!

 

I have no idea what it is......but is looks to be parasitic in nature. I would remove it. That is my gut feeling.

 

parasitic coral pit crab. Remove it with a pair of tweezers and give it the porcelain waterslide

 

thank for information

 

Got it! Thanks. I couldn't get at it in my tank with tweezers, so I removed the coral from the tank and fresh water dipped it while trying to remove the parasite. It was really wedged into the coral tightly. I finally cracked the parasite's shell trying to get it out and had a little shrimpy swimmy thing that certainly didn't like the fresh water. It twitched a bit before it bit the dust. I cleaned the rest of the debris out and now I have quite the pit in my coral, but no more creepy wiggly thing. Yay!