Chaetoceros atlanticus (IMAGE) Hokkaido University Caption The diatom Chaetoceros atlanticus, a type of marine phytoplankton responsible for primary production in the ocean through photosynthesis. (Photo courtesy of Kohei Matsuno). Credit Kohei Matsuno Usage Restrictions This copyrighted image may be used to cover this feature story as long as the copyrighholder is credited. License Original content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.