Phytoplankton (the so called autotrophic cells) enables the synthesis of organic substances from carbon dioxide and anorganic substances dissolved in water by using the photosynthesic process. They form the primary basis in the food chain in fresh as well as in marine waters. Phytoplankton represents an important source for all kinds of animals such as zooplankton and water filtering organisms. These higher organisms represents the source for higher organisms such as fish and seal.