Dinoflagellate (Dinoflagellate) is a type of single-cell protozoans. The cell wall is cellulose photosynthesis. There is often a and chlorophyll Yellow Sea-green or Red-Brown as phytoplankton in freshwater and in the marine dinoflagellate Gonyaulax red like to make water a reddish brown or Red tides, which are called the production of toxic substances toxic to the nervous system causes the dead fish a lot. Humans who eat these fish have a chance to get the same toxins.