Worm ID?

[fish4me]

I think, based on what I've read here, that this guy is probably a peanut worm. He keeps leaving poop all over the sand below the rock he pops out of, though.

So my questions are:
What is he?
What is he eating that he can poop so much?

 

[reefreak29]

it is in fact a Sipunculid or Peanut Worm, they eat detritus

 

[fish4me]

Hmm. This guy always comes out of the same hole in the rock, although I find him stretched to several other holes. Is there that much detrius inside my live rock? It was cured. I know there are plent of other worms in it, and probably pods.
I guess I'm amazed by the thought of what else there must be living in there that he's eating and I can't see! This is the neat part of this hobby!