NASA Turquoise Swirls in the Black Sea

On May 29, 2017, the Moderate Resolution Imaging Spectroradiometer (MODIS) on NASA’s Aqua satellite captured the data for this image of an ongoing phytoplankton bloom in the Black Sea. The image is a mosaic, composed from multiple satellite passes over the region. via NASA http://www.nasa.gov/image-feature/turquoise-swirls-in-the-black-sea