Another ID help needed.

[DomC]

I am in the process of cycling 100 gallon system on week two. I found this worm like this on some live rock. It seems to be attached. Anyone have any idea what it is and it's good or bad?

Thanks

Dom

http://i202.photobucket.com/albums/aa46/Domdezzy/Snapbucket/1403CB14-orig.jpg

[thegrun]

It looks a lot like a sipunculida (peanut) worm which will live in the crevices of rocks but not actually attach themselves to the rock like eunicid (rock) worms, but they (eunicid) look different than yours.

[DomC]

Thanks. This is what I was able to find. Peanut Worms, Sipunculid Worm.

http://www.seaslugforum.net/images/sipunculid.jpg