id please. (pics)

[mauls]

I was watching my dull and somewhat empty tank today and saw this on some live rock. There is at least 3 of these in my tank, prolly more.

Any Idea's? It looks somewhat like a caterpillar

Thanks in advance

 

[Cope]

Bristle worm, good part of your clean up crew.

 

[mauls]

ahh, thanks for the reply, I've always heard of them, just never seen one.