Six lines are known to be nasty reef inhabitants. A Yellow Coris Wrasse will take care of your bristle worms and many other pests in the tank, like flatworms. Very beautiful to look at and takes a giant dive into the sandbed to sleep at night and comes out in the am, which I always thought was very cool. It gets along with all other fishes, even when it gets a little bigger, which is unlikely to be the case with a six line.
Damn beautiful fish is that Coris Wrasse! But get's to big for my tank 5" my tanks a 26