That is a lot of red in the dorsal. My camera never seems to catch that color (flash washes it out) on my S. maps. Beautiful leuco, what are you feeding?
He's about one year old and only in the last few months have his colors popped and his dorsal fin grown so long. I suspect sexual maturity and spring photoperiod with increased feeding brings out their best tones. He's not large yet, perhaps 4.5" of body mass. I keep all my fish on the thin side and jurupari are somewhat slow growers so I believe he's on schedule for size and age. Am I wrong? Nitrates were getting in the 40's for awhile there before the pothos. Now they don't even hit ten in a week. So if he's delayed at all he'll have no problem catching up now.How long did it take for the colors to come out?