We select the most intense color and highest coverage from our BEST breeders. You won’t be disappointed when you receive them. Just know that with Koi Angelfish for them to retain and even improve the color intensity and coverage they must be in a good environment and need to be feed foods that are high in carotene. We also suggest putting them in a tank with Dark Backgrounds. The food that we feed all of our Koi’s is our Grand Champion RED granule. This is one of the best foods you can buy. It is coated at 400ppm astaxthian. And it is a granule (not extruded) so it retains all of it’s vitamins and protein.