xiāqīngsù / shì / cúnzài / yú / xiā / xiè / hé / guīyú / zhōng / de / yìzhǒng / tiānrán / sèsù虾青素是存在于虾、蟹和鲑鱼中的一种天然色素。Astaxanthin is a natural pigment found in shrimp, crabs, and salmon.