Xanthophylls are carotenoid pigments (also found in marigold petals and egg yolks) that fish can’t synthesize themselves but absorb from feed, deepening natural red, orange, and yellow coloration. This is the active ingredient behind most ‘color enhancing’ koi and goldfish foods, it doesn’t create color that isn’t already there genetically, but it does bring it out more fully.
Xanthophyll
Lokorio
Certified Aquaculture Expert & Founder, Memeilo Ponds
Moses Lokorio is a certified aquaculture expert with over 6 years of hands-on experience helping fish-pond builders create healthy, balanced pond ecosystems. At Memeilo.com, he writes detailed, data-driven guides to simplify pond construction, maintenance, and fish care for DIYers and professionals alike.