I kept a volitan with many a variety of triggers, 8 years with a niger and humu. About 3 with a clown, the clown went to a bigger home because of his aggression toward the other triggers. An emporer for 4 years, I put him in a bigger because I just thought he would be happier, this was in a 180g. I grew up in the hobby putting lions in aggressive tanks with triggers and angels and tangs, I never saw any of the nipping everyone talks about now. I know this is just one man's experience but could someone with actual first hand experience, and not just repeating something you heard, chime in and report. I can imagine the lions mane getting nipped in a feeding frenzy but I never saw my angel or one of my triggers maliciously attack a lion.