What is Haematococcus Pluvialis Extract? Haematococcus Pluvialis is a microalgal species that is characterized by its ability to accumulate significant concentrations of astaxanthin. Astaxanthin is a very valuable carotenoid on the market. It occurs naturally in certain algae and runs the color gamut from red to pink. Some astaxanthin can also be found in specific seafood types. Astaxanthin is an …