Fuji ogon koi, where only the head of the Koi is metallic Orenji ogon koi, and that is all orange like a standard goldfish, by using a pink splotch on its again. Goldfish lovers are usually really fond og the Orenji.The matsuba koi is essentially an Ogon with reticulation. It is a a person coloured metallic koi with dark pigment within the scales.S