Microdictyon Bed (IMAGE) PeerJ Caption Macroalgae beds such as this Microdictyon setchellianum at a depth of 64 meters (210 feet) off Pearl and Hermes Atoll play a critical role in the ecology of deep coral-reef ecosystems. Nearly every fish in this image is a species endemic to the Hawaiian Islands. Credit Greg McFall 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.