What is astaxanthin? Astaxanthin is widely found in the biological world. Shrimp, crabs, fish, birds, some algae, and fungi all contain astaxanthin. Astaxanthin itself is orange-red. If the color of an animal is redder, it means that the body’s astaxanthin content is higher, and the ability to adapt to harsh environments is stronger. At present, astaxanthin is mainly produced in …