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
Great Lakes Theater who credits the Great Lakes Theater Festival for beginning his acting career. Great Lakes Theater was formerly known as Great Lakes Theater Festival, which continues to be its legal name. "Festival" was dropped from the classic theater company’s business name to better reflect its September through May season, and programming format. Arthur Lithgow started what was going to be Great Lakes in the 1950s at Antioch College, in Yellow Springs, Ohio. During the few years in Antioch, all of Shakespeare's plays were performed. The company traveled for performances at Stan Hywet Hall in Akron, the Toledo Zoo, and Cuyahoga Falls.