Looks to me like the one on the left is a fire and the one on the right is a bristle. If you're trying to get a 12" bristle worm, a six line won't do a thing, he'll be way to small to try and take it. Personally, I'm with Lisa and most everyone else, bristleworms are great, there's nothing wrong with them, it's their cousin the fire worm that always gives them a bad rep.