is it harmful
 

i just purchased a new piece of live rock with some mushroom corals on it. whie looking at it i noticed this millipead looking thing and i was wondering if someone coulg tell me to keep it or destroy it. it looks like a tentical of a brown brittle star

but it does not have a bunch of tenticles just looks like a worm with a bunch of little legs

any help is better than no help lol

thanks
jason

FOr some reaosn fire worms come to mind. I am almost certain it isn't right but It soulds like a sandworms or a pile worm type creature. I have heard some of them are harmless and some of them are very predatory.

Wish I could be more help but all I know is what I have seen and read about. Never gone salt water, yet.

It sounds like a bristle worm to me and they are fine in your tank.

I second bristleworm.

Bristle worms are fine in small numbers, but when they start multipling and getting bigger can be a headache.