A Plankton Bloom Swirls in Dark Water (IMAGE) St. John's College, University of Cambridge Caption A plankton bloom swirls in dark water. Deep-sea currents bring nutrients up to sunlit surface waters fueling the growth and reproduction of these tiny plants. Credit Credit: NASA via Flickr 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.