Help Identifying Something
 

When I got home from work tonight, I noticed a very small (1cm max) thing darting around my aquarium. I couldn't really get a good look at it, but I would say it looked "wormish" if I had to. It was extremely fast and kept trying to burrow into the live rock.

Any ideas? I'm new-ish to saltwater aquariums, so this might be obvious and I just don't know! Thanks in advance.

**Edit: I captured the little bugger on film. It burrowed into a little hole and I got the tail end of it sticking out.**

http://x81.xanga.com/4f2d176757c3284.../w58100897.jpg

A fast worm? I have no idea. Try to see it while it's feeding, and if it's feeding on a Coral, catch it and kill it.

It's a peanut worm. They do not bother anything. Good cleaner

J