I don't know if it's the lighting or the fish, or both, but the fish look absolutely perfect. I mean, obviously it's the quality of the fish and quality lighting and water, but wow.
I just moved my "pick of the litter" Kelberi Ipatinga & Geo Altifrons (tapajos yellow) & crenicichla marmorota into the tank behind my desk... So I can enjoy them all day long!: