Toxic Algal Blooms

The cause of the green water is the growth of single-celled organisms known as
cyanobacteria (sometimes incorrectly called blue-green algae). Florida, as well as several other states and countries in other parts of the world, have a repeated history of these “algal” blooms, which can have serious negative effects on humans and the environment. Cyanobacteria produce several toxins that, if ingested by humans or animals, can cause symptoms as mild as a skin rash and as severe as death. They’re also thought to be linked with the development of neurological disorders like Alzheimer’s disease and ALS in some people. When the cyanobacteria infestation begins to die off, it’s degraded by bacteria, significantly increasing the amount of respiration in a given body of water. Consequently, dissolved oxygen levels decrease, causing massive fish kills through asphyxiation.
http://www.onegreenplanet.org/environment/floridas-toxic-algal-blooms-threaten-humans-and-animals/?utm_source=Green+Monster+Mailing+List&utm_campaign=73defd317d-NEWSLETTER_EMAIL_CAMPAIGN&utm_medium=email&utm_term=0_bbf62ddf34-73defd317d-106919241