Worm ID please

[holly]

I found this on the underside of a frag plug while dipping. It is about 1/3 inch long. Any ideas?

 

[Jimmyb819]

Picture is a bit fuzzy and dark but it looks like it could be a bristleworm, which are reef safe scavengers.

 

[reef lover]

kinda looks like a flarworm or small ribbon worm...no good...

 

[holly]

Thanks for the replies. Yes, both bristleworm and flatworm where on my list of possibilities. As you both said, one is okay, the other maybe not-so-much. Anyone have more specific guesses?