Cyanotoxin which is why they are usually green or blue. Cyanobacteria are found almost everywhere; in oceans, lakes and rivers as well as on land. They flourish in Arctic and Antarctic lakes, hotsprings and wastewater treatment plants. They even inhabit the fur of polar bears, to which they impart a greenish tinge. Cyanobacteria produce potent toxins, but they also produce helpful bioactive compounds, including substances with antitumour, antiviral, anticancer, antibiotic and antifungal activity, UV protectants and specific inhibitors of enzymes. Cyanotoxins are often implicated in what are commonly called "red tides" or "harmful algal blooms". Lakes and oceans contain many single-celled
Monica (given name) Monica (given name) Monica is a female given name with many variant forms, including Mónica (Italian, Spanish and European Portuguese), Mônica (Brazilian Portuguese), Monique (French), Monika (German), Mónika (Hungarian). "Monica" is an ancient name of North African origin whose etymology is unknown. The earliest reference to the name is found in ancient Numidian inscriptions. The name might include a reference to the ancient Libyan god "Mon", whose name was derived from the Egyptian god Amun. Saint Augustine's mother was named "Monica", and she was born in Numidia, North Africa, although she also was a citizen of Carthage, hence the possibility