You would never believe how much serious koi keepers spend that participate in competitions. I believe an amateur koi costs around $10k and a high quality one will run you $100k but don’t quote me as I can’t remember where I got those numbers from.Wow and I thought my flowerhorn at $700 was an expensive fish lol never had a Amazon red tail but I have had an asain red tail cat once and he was an extremely aggressive cat. He killed my channel cat and bumble bee cat along with my albino millennium rainbow fish and polar parrot and plenty of convicts. And he tried to kill my bumble bee cichlid along with both of my American flathead cats.