Fuji ogon koi, where only the head on the Koi is metallic Orenji ogon koi, which happens to be all orange like a typical goldfish, which has a purple splotch on its back again. Goldfish fans usually are very fond og the Orenji.A blemished or dirty head stands out on all Ogon types. Yamabuki may vary in tones of yellow, from a light, lively yellow t