Dude you have to separate those fish. The only thing you're missing is a Red Tail Cat.
The Dovii has to live all alone or with dithers. The Xingu and the Dovii are a rough mix. The Pike is such a hunter and so fast, but that Dovii is a BEAST.
The Jag, Polleni and the Flowerhorn can be good together depending on their individual temperaments but I can see polleni pieces in your filter intake right now. That's a beautiful fish and everything else in that tank can and will eat it.
