spaghetti like worms irritating SPS

[Oimate84]

Ive noticed some of my acropora and millepora were STN'ing, so I looked at night to see what might be causing it, and I noticed small white stringy looking worms that were on the bleached part of the acro. They dont seem to be "spaghetti worms" because they dont have multiple heads. But they are small and individual worms. Sorry I cant take pictures, but any ideas of what type of worm they could be? and are there any predators that can control this polpulation of worms? thanks