That fish bears more than a passing resemblance to my RT. It's already pretty and will be prettier still with some TLC. I don't have enough experience to guess what it will mature to; I just think it's gorgeous.
FWIW I have found my RT Caligula to be so aggressive even at a young age that he beat several festae and jewel cichlids into submission and / or killed them. He tore apart a female carpintis and bit pictus cats in half... butt end first so he wouldn't get stung. He's in a tank by himself now on account of his tendency to murderize every living creature he comes across.
I'll get some better pictures once it's settled in but thanks for sharing how aggressive it is.
Do you think a fish like this would care for a large clown knifefish as a tankmate or just leave it alone? I'm guessing it would probably pick on the CK.