The biodiversity of microalgae, being potential producers of a wide spectrum of natural substances of vital human need, microalgae have so far been a rather under explored source in the contemporary development of Biotechnology. Haematococcus pluvialis Flotow is a motile, eukaryotic, unicellular, biflagellate, green, fresh water alga. This alga possesses richest source of astaxanthin and is now cultivated at industrial scale. Astaxanthin is a strong coloring agent and a potent antioxidant of its strong antioxidant activity to target several health conditions. The topic of this book...