The knowledge about algal chemistry is gradually becoming more significant. Recently a new term, phycochemistry has been proposed by Shameel (1990). Phycochemistry is the study of natural products and chemical constituents occurring in algae, from a biological point of view. As a new branch of phycology it has emerged as a result of huge and amassed knowledge about secondary metabolites occurring in algal phyla (divisions). It distinguishes itself very clearly from phytochemistry in general on one hand and algal biochemistry on the other. It differs from the main objectives of algal...