Green Coastal Waters (IMAGE) University of Hawaii at Manoa Caption Coastal waters can turn green as shown here at Waimanalo Beach (left panel) when tiny single-celled algae in the genus <em>Tetraselmis</em> (inset) grow to high concentrations. Credit Lydia Baker, UH Manoa, SOEST Usage Restrictions Image may only be used with appropriate caption and credit. 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.