On August 11, 2015, the Operational Land Imager (OLI) on Landsat 8 captured this false-color view of what appears to be a large bloom of cyanobacteria swirling in the Baltic Sea. The image was composed from bands 4 (640-670 nanometers), 3 (530-590 nanometers), and 2 (450-510 nanometers) for the red, green, and blue components of the image, respectively. Band 8 (500-680 nanometers) was used to sharpen the image.