The present book is designed for acquiring a basic knowledge on marine and estuarine phytoplankton and zooplankton, which are tiny free-floating biotic components of the aquatic ecosystem. These drifting biological chips of the aquatic system play and important role in maintaining the global carbon cycle and also in spinning the marine food web. It is well known that phytoplankton are the sources of fossil fuels, and form the foundation stone of world fishery. ...