Black and White Worm???

[zero26]

Was checking out my live rock when I saw what I thought was a small feather duster. It was black and white, and had a white bottom, and it like rolled itself up and down. Then when it rolled it self out, it had what looked like a feather duster mouth.
I took a couple of pics but it was really small, only about a pen point wide but I couldn't see how long it was because of the LR hole it was in.
This was no Bristleworm!!

 

[bang guy]

Sounds like a peanut worm.

 

[rbcjoker]

I've seen those in my tank, and I know I saw a picture of it somewhere around here. Maybe try the hitchhiker/identify this section.