Some type of worm?

A friend gave me a chunk of live rock with pulsing xenia and tree coral on it and im noticing little tiny brown and white striped "worms" with bristles coming out of them. They are way to small to take a pic of but is it a good guy or bad guy I couldn't figure it out from the worm id page

 

Look here. Most likely harmless bristle worms/fireworms.


Worm Hitch Hikers

 

Bristles coming out of them where? On their sides or on their faces? Brown & white stripes sounds like peanut worms, with bristles coming out of their mouths...

 

They look like a bottle brush if that's a better description the bristles are along the whole body and Ill check the page thanks guys

 

That would be bristleworms then.