Variations in salinity also influence the growth and proximate composition of the marine microalgae even though it is tolerant to changes in salinity. According to Rao et al. (2007), adaptability to salinity differs between algae and they are grouped as halophilic (salt requiring for optimum growth) and halotolerant (having response mechanism to survive in saline medium). Decreasing salinity is a unique way to change the biochemical composition of marine microalgae although the changeable role of salinity on starch metabolism indicates its species-specific and cultivation condition-dependent nature (Yao et al., 2013). High salinity has been reported to inhibit the growth, lipid and triacylglyceride accumulation of Dunaliella sp. (Takagi et al., 2006).