[Delphinus]

Sixline wrasses start off being model citizens as juveniles. As they age they get ornery, grumpy, and territorial. You wouldn't believe the amount of damage they can inflict if they feel like it. You may think this be true of all fishes and maybe it is but it's very much a question of "when" a sixline will turn rather than "if." You wouldn't believe how many times I've seen "oh, but not MY sixline, it must be an individual thing" but the problem is they do almost always start off as sweethearts and end up as complete terrors. I lost several fish to my sixline - all of a sudden he'd decide he didn't like them anymore and poof I'd find the poor things without any fins left and left to die, unable to swim or move and stuck on the sandbed. I ended hating mine because of this and was not sorry when he died. With that said he was one of the longer lived fish I had and lived for close to ten years so it was a lonnnnng time I had to wait it out (oh yeah did I mention he was impossible to catch too?). I'll *never* try another and would caution against anyone trying one unless they plan on it being with reasonably assertive fish who can defend themselves against that kind of attack. Unfortunately, like with the case with most bullies, the only defense is actually more of an offensive return attack. I.e., there is no "live and let live" - they have to prove "I'm capable of killing you back if you don't leave me alone". He would viciously attack any new fish I'd get and it would only stop once they attacked back and did serious damage. It's so awesome seeing injured fish in your tank (not). Did I mention I grew to totally hate mine? Classic textbook bully.