Mine swims in open water all day long and isn't bothered by any of my fish. Initial aim was to have a trio, ideally a male and 2 females. Unfortunately one was lost on arrival abd then 2 cohabitated for some time till I found a third and added it. That one from all the genicanthus in my tank was the only one to nip and it only nipped on a euphilia, casual nipper so it took a while for me.to catch it in the act. All the people I spoke to shared by them being model citizens. Since then I added 3-4 small females and my 2 would rip them.appart if I didn't remove them quick, even with intro box, mirrors,.....
One was partially turning male and the other was a female but the subpage never completed the transition till one day when the female started transitioning and the submale nearly shredded it. I took it out as soon as I could net it as it wouldn't go in the trap. Since then I'm.not able to find any here. Plan is to either try 2 small females or find 3 females or 2 females and one final male and add to the tank.
I also had many genicanthus ship bad, have swim bladder issues and popeye... so not the best shipper. Yet amazing fish..