Marine
Water
The marine water is high in salt and only halophilic organisms survive. Since temperature is very low, most of them are psychrophilic. Diatoms and protozoa as dinoflagellates are important components in food chain. In the off shore oceanic zone, photosynthetic organisms are present. These are diatoms and dinoflagellates.
Most marine microbes are found along the shoreline or littoral zone where nutrients are in abundance. Some unusual types are also present on the ocean floor in the benthic zone and even at the bottom of several miles-deep trenches, the abyssal zone.
