Algal Bloom (IMAGE) University of Southern California Caption A fluorescence microscopic image showing an example of the phytoplankton and bacteria that David Needham and Jed Fuhrman observed during a five-month study of algal blooms. The large star-shape in the middle is phytoplankton; the larger green dots are bacteria or Archaea; and the tiny green dots are viruses. Credit Courtesy of David Needham and Jed Fuhrman/USC Usage Restrictions For use in news stories only. 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.