Estuaries have been regarded as the most productive of the aquatic systems support fisheries of commercial value. Estuarine ecosystems are of interest to marine science because of their high primary production which provides a continuous food supply and shelter for many organisms which feed and live within them. Maximum phytoplankton growth, biomass and rates of production can occur in different estuaries at different times of the year depending on local environmental conditions. Phytoplankton growth and annual production varied according to different climatological conditions with several...