Unlike chlorophyll and Beta-Carotene, which are both found in terrestrial plants, Astaxanthin is found predominantly in marine life. A form of microalgae, Astaxanthin is consumed by many different types of aquatic life, and its intense red pigmentation results in these animals having red or pink flesh, or outer shells. Because of this, one of the highest concentrations of Astaxanthin, other than the Haematoccus Pluvialis algae (the truest form of the microalgae which fish eat) is found in Wild Pacific sockeye Salmon. This pigment is what gives the fish's flesh its signature deep red hue, and incredible antioxidant properties. Scientists theorize that the antioxidant properties of natural Astaxanthin in salmon helps provide the endurance these remarkable animals need to swim upstream to spawn. Natural sources of marine life that contain Astaxanthin include Lobster, Shrimp, Crab, Trout, Algae & Krill.