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
Meredith (given name) Meredith (given name) Meredith is a Welsh given name, and a surname common in parts of Wales. It is of Welsh origin and, as a personal name, was until recently usually given to boys. Meredith has many derivatives which have become personal names and surnames as well. In Old Welsh (c. 800–1150) the name was usually rendered as "Morgetuid" or "Margetiud". The exact meaning of the first element, "Mere", is unclear although some Welsh scholars have translated it as "great" or "splendid". The final element of "iudd" has the meaning of "lord", and is found in other Welsh names such