Definition of astaxanthin
: a carotenoid pigment C40H52O4 found in red- or pink-colored aquatic organisms (such as shrimp, lobster, and salmon) and the feathers of some birds that is used especially as a food coloring and dietary supplement
- Wild salmon attain their color by absorbing a carotenoid called astaxanthin from their krill-based diet, while farmed salmon eat fish feed supplemented with various sources of astaxanthin to enhance their grayish color.
- —Cook's Illustrated
- Astaxanthin is found in many marine animals, like shrimp and fish, and is also responsible for the pink color of flamingos that feed on crustaceans rich in the pigment.
- —C. Claiborne Ray
