Fuji ogon koi, where only The pinnacle on the Koi is metallic Orenji ogon koi, which can be all orange like a standard goldfish, that has a red splotch on its back. Goldfish fans are often pretty fond og the Orenji.A blemished or dirty head stands out on all Ogon types. Yamabuki will vary in tones of yellow, from a light, vibrant yellow into a darkā€¦ Read More