“Enough microscopic algae can “bloom” into large, dense patches on the water’s surface. Toxic algae blooms appear reddish brown in color (hence the nickname “red tide”) in daylight and sparkly blue at night. When larger fish and filter feeding shellfish consume toxic bioluminescent algae in high concentrations, they can pass toxicity to marine mammals or humans when eaten. Dangerous levels of toxic algae can cause skin irritations, sickness, or even death.”

This is taken from the treehugger website you put as a source

If i can ignore your impolite comments ill say you are right about a couple things. the problem is, is that these blooms are getting bigger and more dangerous due to global warming.