JennM;932131 wrote: Love thy worms. It's harmless to healthy, living creatures (except perhaps your fingers). They won't eat coral or live fish.
They will make short work of dead/dying tissue, whether it's fish, coral or invert, leftover food, etc. You WANT them to do that, because cleaning it up is better than leaving whatever to decay.
If you have a dense population of bristleworms, you're feeding too much. Seeing one or two here and there is no biggie. If your rocks come alive at feeding time, with them crawling all over... then it's time to cut back the food. Their population will respond to the amount of available food, so they can be a good indicator of that.
Jenn