Canthaxanthin is a naturally carotenoid widely distributed in birds, fish, crustaceans, fungi, and algae, and is commonly used as a feed additive to provide red pigmentation. In poultry farming, canthaxanthin is added to give egg yolks and broiler skin a red color. It enhances the color of egg yolks to meet market demand for golden-yellow yolks with the combination of yellow pigments. In salmon farming, adding astaxanthin can achieve the desired flesh color to enhance consumers’ appeal. It also possesses antioxidant properties and free radical scavenging capabilities. The feature of vitamin A activity can improve the appearance of animal products, and enhance the antioxidant defense mechanisms within these animals' bodies.