Fuji ogon koi, where only The top of the Koi is metallic Orenji ogon koi, which happens to be all orange like a common goldfish, using a crimson splotch on its again. Goldfish enthusiasts are usually really fond og the Orenji.The matsuba koi is largely an Ogon with reticulation. This is a 1 colored metallic koi with dark pigment to the scales.Butte