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 Aquarium Great Lakes Aquarium The Great Lakes Aquarium opened in 2000 and is located on the Duluth waterfront. A 501(c)(3) private nonprofit, its mission is to inspire people to explore their connection to Lake Superior and waters of the world. Great Lakes Aquarium features animals and habitats found within the Great Lakes basin and other freshwater ecosystems such as the Amazon River. The Aquarium houses 205 different species of fish, birds, reptiles, amphibians and mammals. It is one of few aquariums in the United States that focuses predominantly on freshwater exhibits. Many of the main exhibits at Great Lakes Aquarium (GLA)