My venustus has already started terrorizing the tank a little bit. No chunks missing from anyone's fins yet, but he's the one who's chasing people down. He's also growing faster than anything besides the moorii. If he keeps getting more aggressive I may have to pull him to protect everyone else. It's unfortunate though because he's a beautiful fish with a lot of personality. My kenyi actually hasn't been aggressive at all. My little peacock is meaner than he is (at least so far).