This program aims to characterize the phytoplankton community succession on the northern coast of the Bay of Bengal at monthly interval using spectrophotometric chlorophyll-a determination and light microscopy screening. Monthly samples have been collecting at spring tide during the day time from different locations on south-east coast using a plankton net, preserved, appropriately labeled, and sent to the laboratory for analysis. Physio-chemical parameters including nutrients (i.e. NO3-N, PO4-P) are monitoring and the quantitative estimations (i.e. biomass and cell numbers) of phytoplankton are done by fluorescence sensors and the Sedgewick-Rafter counting chamber method using light microscopes.