Genetics Reveal that Reef Corals and Their Algae Live Together but Evolve Independently (3 of 3) (image) Penn State Share Print E-Mail Caption The ability of corals to thrive in nutrient-poor, tropical waters is due to their intimate relationship with single-celled dinoflagellate algae in the genus Symbiodinium, shown in this microscopic image. The Caribbean elkhorn coral, Acropora palmata, cannot survive without its dinoflagellate partner and new research at Penn State University shows that a particular coral colony forms a long-lasting partnership with just one clonal strain of Symbiodinium fitti. Credit Todd C. LaJeunesse, Penn State University Usage Restrictions The image caption must be published along with the image. Share Print E-Mail 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.