Fuji ogon koi, where only The top of the Koi is metallic Orenji ogon koi, which is all orange like a typical goldfish, with a crimson splotch on its again. Goldfish lovers are frequently very fond og the Orenji.The matsuba koi is essentially an Ogon with reticulation. It is just a just one coloured metallic koi with dark pigment within the scales.A