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
Queen of the Lakes Queen of the Lakes Queen of the Lakes is the unofficial but widely recognized title given to the longest vessel active on the Great Lakes of the United States and Canada. A number of vessels, mostly lake freighters, have been known by the title. "Queen of the Lakes" has been used as the name of three vessels that sailed on the Great Lakes, but none was the longest on the lakes at the time. The first was a three-masted Canadian schooner built in 1853 as the "Robert Taylor", measuring 133 feet. It was renamed "Queen of the Lakes" sometime before