Close-Up Image of Phytoplankton (IMAGE) U.S. National Science Foundation Caption Phytoplankton (shown) are food for zooplankton, in turn the base of the oceanic food web. Credit NOAA Usage Restrictions None License Licensed 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.