A sustained algal bloom, i.e. 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 extra nutrients from fertilizers causes heavy algae growth (Sharma,2011). Once the algae die, they are decomposed by bacteria which decrease the oxygen concentration in the water, so aerobic organisms may not survive. “Red tides” are “blooms” formed by Dinoflagellates. In these blooms, the cell could be so wonderful that it colors the home sea, red, ruddy, yellow or brown. Dinoflagellate blooms, which form terribly massive blobs, can stain the ocean up to several square kilometers. Dinoflagellate blooms tend to form red tides usually in areas protected from strong winds. Most of these blooms are toxin producers, resulting in the killing of fish and many other marine creatures. Not all algae blooms are destructive, even if they are red in color. There are blooms of Ceratium furca in Perak, Lumut and Penang which does not release toxins although it contains the characteristic impact of red tide (Tan, 2014). Say no to plagiarism. Get a tailor-made essay on "Why Violent Video Games Shouldn't Be Banned"? Get an original essayClimate change generates perfect conditions for the development of microalgae. Microalgae not only thrive in warm water due to rising temperatures, but they also grow faster on the surface of warmer water than on cooler water at the bottom. This is also harmful because this photosynthetic organism can easily receive sunlight on the surface of the water and in fact grow more rapidly. Furthermore, increasing concentrations of atmospheric carbon dioxide are also beneficial for the development of microalgae. A climate altar also influences precipitation rates and patterns. Rising temperatures will intensify the water cycle by promoting evaporation. More storms would form and contribute to the drying out of some land areas. This presents a problem when increased precipitation and storms cause more frequent nutrient contamination. Therefore, the fertilization of arable land, the disposal of waste water, industrial waste, the use of detergents, animal breeding are some of the actions responsible for the anthropogenic supply of nutrients (Bennett, 2017). There are several disadvantages related to eutrophication. The blooms are responsible for the deaths 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. The bacteria that decompose these dead organisms consume oxygen in the process. Since most aquatic animals need oxygen as much as terrestrial animals, the ultimate effect of eutrophication is the creation of an area (dead zone) where no aquatic animal can survive (Lallanilla,2018). They have an unpleasant taste and emit a foul odor into the water, making it unfit for drinking and breathing. Additionally, cyanophyte blooms have long been associated with animal poisoning. The toxins from Anabaena blooms have been defined as anatoxins. The alkaloids present in anatoxins are extremely toxic and produce neurological symptoms within minutes of ingestion. Toxins found in dinoflagellate blooms are responsible for neurotoxic shellfish poisoning in,2011).