The fish in your picture looks like the one in my Avatar.
He was one of a batch of very pretty young females at MA about 10 years ago. I bought a group of 6.
As they grew the became very aggressive with a lot of flaring and posturing. At this point I realised they must be Plakat males and ended up with several more t
anks and a split tank. Talk about multiple tank syndrome!
Couldn't keep even one of them in the main aquarium as they would hunt down smaller fish and...
Had a disaster with the split tank. One of the males jumped the divider and there was a nasty fight. They ripped each other to shreds
I tried keeping Amano shrimp with one of them. Was fine right up till the Amano shed his skin. I saw the last of him disappearing into a very smug Turquoise plakat :-/ Very expensive snacks !
They are beautiful fish and I spent ages photographing them.
Enjoy him for what he is - a real beauty and a great character