I have bristleworms... before I had any fish they opening wriggled around the tank along with my many pod varieties. But then I introduced my sixline and now all you will see of them is in the crushed coral at the bottom and on some of the deeper crags of the live rock. I agree, though, they're ugly... but none of mine are over 3 to 4 inches and they hide almost all the time, except when its time to feed. They clean up the tank really well for me. No food stuff is left behind in my tank and I only have one fish! I have not noticed any strange or mean behavior from my sixline yet-- he's small and by himself (fish-wise) so that may change this weekend when the other fish join him, but he seems docile compared to other sixlines. When he came from the seller (local guy), he was in with clowns and they left each other alone.
Are sixlines bred in captivity or caught?