Mermaid's Wineglass in High CO2 (IMAGE) University of Washington Caption This image shows mermaid's wineglass algae from a site with high carbon dioxide. Note the greener color. Credit Jason Hall-Spencer Usage Restrictions Credit photographer. 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.