Just remember every fish is an individual. I just got rid of my Humu Humu because after 3 monthes of being a nice peaceful fish he became very agressive for one day( he was about 4inches, and going after a 5inch YT and a 5.5-6 inch Red Corris Wrasse). He seemed back to his old self the next day but it was not worth the risk to me. Not to mention he grew almost and inch in 3 monthes and I picked a Humu Humu because they are normally slow growers, I took him back to my LFS and now have a Blue Throat