worms

I recently noticed that a frag of green mdntipora had a small area where the flesh was gone and the skeleton was exposed. It had soon before i noticed this fallen from it's spot, so I thought that it had possibly been damaged and the flesh had simply fallen off. I kept an eye on it, and a week...

I was checking out some pods on the glass when I noticed a group of white worms about the same size as pods, just elongated and moving around on the glass. No discernable limbs, not free floating. Should I be worried? First time i've seen them is today, and just the one group of about 4-5...