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
Erika (given name) name in many Western societies. It is also a popular given name for women in Japan (even though its origin has nothing in common with the Nordic roots of the Western version). "Erica" is also the name of a genus of approximately 860 species of flowering plants in the family Ericaceae, commonly known as "heaths" or "heathers" in English, and is the Latin word for "heather". Erika (given name) The given name Erika, or Erica, is a feminine form of Eric, deriving from the Old Norse name "Eiríkr" (or "Eríkr" in Eastern Scandinavia due to monophthongization). The first element, "ei-"