Phytoplankton (IMAGE) University of Washington Caption Phytoplankton like those pictured range in size from 1 to 20 microns and can be automatically counted and classified by SeaFlow technology using sensors and computers. Credit Francois Ribalet Usage Restrictions Image credit required 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.