A sustained algal bloom, which is an increase in the amount of a microalgae species, could cause eutrophication. Eutrophication is a process that can occur in rivers, shallow lakes, and other bodies of water when the addition of additional nutrients from fertilizers causes heavy algae growth (Sharma, 2011). Once the algae dies, it is broken down by bacteria, which decreases the oxygen concentration in the water, so aerobic organisms may not survive. “Red tides” are “flowers” ​​formed by dinoflagellates. In these flowers, the cell can be so impressive that it colors the sea domestically, red, reddish, yellow or brown. Dinoflagellate blooms, forming terribly massive patches, can stain the ocean over several square kilometers. Dinoflagellate blooms tend to form red tides, usually in areas protected from strong winds. The majority of these blooms are toxin producers, leading to the death of fish and many other marine creatures. Not all algae blooms are destructive, even if they are red in color. There are Ceratium furca blooms in Perak, Lumut and Penang which do not release toxins although they contain the characteristic impact of red tide (Tan, 2014). Say no to plagiarism. Get a tailor-made essay on “Why violent video games should not be banned”?Get the original essayClimate change is generating perfect conditions for microalgae to thrive. Microalgae not only thrive in warm water following high temperatures, but also grow more quickly on the surface of warmer water rather than on the surface of colder bottom water. This is also harmful because this photosynthetic organism can easily capture sunlight from the water surface and indeed grow faster. In addition, increasing concentrations of atmospheric carbon dioxide are also favorable for the development of microalgae. A climatic altar also influences the rates and forms of precipitation. Rising temperatures will intensify the water cycle by promoting evaporation. Other storms would form, helping to dry out some land areas. This poses a problem when increased precipitation and storms lead to more frequent nutrient contamination. Thus, the fertilization of arable land, the disposal of sewage, industrial waste, the use of cleaners, the breeding of animals in the broad sense are some of the actions responsible for the anthropogenic supply of nutrients (Bennett , 2017). Eutrophication has several disadvantages. Blooms are responsible for the death of fish and many other aquatic creatures, primarily because they decrease the amount of oxygen in the water. As large populations of microalgae and other organisms reproduce, they die and their remains fill the lake or ocean floor. Bacteria that break down these dead organisms, consuming oxygen in the process. Since most aquatic animals need oxygen as much as terrestrial animals, the end effect of eutrophication is the creation of a zone (dead zone) where no aquatic animals can survive (Lallanilla, 2018) . They taste unpleasant and emit a foul odor into the water, making it unsuitable for drinking and breathing. Additionally, cyanophyte blooms have long been associated with animal poisoning. The toxins of proliferations,2011).