Well, the adults are only sparring when I make changes in the tank.That's my problem with Platys, if they aren't making babies they're fighting with each other. He's probably being bullied & unfortunately he probably won't last long like that. I couldn't even keep 2 lousy Platys in Zach's tank without one beating on the other. When these final 2 Platys go they won't be replaced. I never understood how folks can keep 5 or 10 males in a tank together without problems. We only had three males and one bullied the other two. We moved the bully out & the other two started fighting...............
I got into fish keeping to relax, not watch some fish get bullied to death.
But this is a freaking tiny fry, getting bullied by an even smaller fry and another one that's almost as big as he is. I don't get how that tiny thing can actually bully him, but it does. It won't let him sit under the fern leaves for long.
I don't have two adult males though but I've had before (a red one with black tail and a black one and an orange one I think). They got along well, but the black one decided to explore a snail shell and died in the shell... -.- Because a hoplo turned the shell over and got him stuck.
I also had a case of males fighting it out and probably killing the weaker male (it was a case of sneaker male going mad, as it was one HUGE male).
Oddly, Sushi appears to be female so I don't know why that fish is attacking Ninja (who is most likely male as he's courting Sushi). And my adult females are attacking my adult male too lol, poor guy, now he keeps a distance from the ladies.