Aerial view of a rugged coastline with turquoise waters

Detailed Description In early September 2017, Landsat 8 captured this image of what looked like an oil spill off the coast of Brazil, near Sao Paulo. The "oil" turned out to be a vast algal bloom that covered more than 100 km. This bloom was the result of a species of tiny dinoflagellate that multiplied quickly to produce astronomical numbers -- enough to color the ocean water. Sources/Usage Public Domain. https://www.usgs.gov/media/images/landsat-8-reveals-algal-bloom-brazils-coast-near-sao-paulo-2017