What's this?
 

What are these things? I've got quite a few. Are they bad? What looks like a tiny string or spider web comes out and then retracts every once in a while. The pictures aren't that great but what I'm tring to show is the little 'tube' on the side of the rock. I wanted to draw a circle around it but couldn't figure out how.

http://i134.photobucket.com/albums/q...2/IMG_2803.jpg

http://i134.photobucket.com/albums/q...2/IMG_2804.jpg

Thanks

I would say its a peanut worm, it doesnt look to harmful to me though

Not Peanut Worm, they're hard right? I've got a few, and I think they're a Tube Worm or Snail.

Yeah, they're stiff. And I think they are multiplying. They don't seem to be harmful...but some tube worms are bad. Just looking for info.

Looks like vermetid snail, not harmful but sharp so a nuisance if picking up LR.

http://www.reef-aquarium.net/resourc...rs/snails.html

That looks like them, thanks a lot Mark. I read the link and did a google search they're kinda neat I guess.

Thanks again
Mike