Yellow tail(Scleropages macrocephalus) is a natural species. While the Banjar Red is a hybrid. It's a confusing hybrid though. I've seen SR(Scleropages legendrei)xGreen(Scleropages formosus) and SR(S. legendrei)xYT(S. macrocephalus) being called Banjar Red. But really, it depends on where you got it from too. I've seen farms calling Yellow Tail and Banjar Red, the same thing. I've seen farms calling Yellow Tail natural and Banjar Red hybrid. But I believe the real S. macrocephalus should just be called Yellow Tail Arowana. While the hybrid of S.legendrei and macrocephalus should be called Banjar Red. Since S.macrocephalus originated from the Banjar masin in Indo. Since the hybrids are crossed and have legendrei genes, Banjar Red would make more sense for the hybrid. Like I said it's confusing since not many research is being done on Aro. You can't really rely on farm/common names. There's too many crossbreeds in the Asian Aro world now. I've seen XBxRTG,HBRTGxRTG,XBxHBRTG,XBxSR,XBxGreen,SRxRTG,SRxHBRTG,SRxGreen, RTGxGreen, etc many more combinations. Get's complicated.