Bleached staghorn corals in Guam (IMAGE) University of Guam Caption Staghorn corals in the reef flat off Hagåtña appear bleached as a response to stress from environmental changes. As one of Guam's dominant reef-builders whose habitat experiences temperatures up to 97 degrees Fahrenheit, this species was used in a University of Guam study published in February that found that shade can mitigate the effects of heat stress on corals. Credit University of Guam Usage Restrictions None 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.