parasite bacteria

I noticed this lobo Khol has been having some issues notice some white buildup on the side look like worms. Took the coral out and decided to dip it today in a revive and iodine dip. Then I noticed these white worms looking things were coming out like crazy. Was wondering if anyone had any more...

i’ve noticed a couple of these in my tank. Does anyone know what this is and is it harmful? if it’s harmful, what is the best way to remove from reef tank?