The other day I was cleaning up a frag and a piece of the rock the frag was attached to broke tearing 2 of the polyps, a couple of days later I noticed the whole micromussa frag is covered in what looks like a dark color mucas/slime that looks like it has bubbles in it, I would post pictures but wasn't able to get none before going to work, what could this be, is it a defense mechanism or is it the frag trying to heal itself, or is int possibly something else, please help


