Nassau Grouper Aggregation (IMAGE) University of California - San Diego Caption A researcher swims in the midst of a Nassau Grouper aggregation as part of an ongoing effort to track the critically endangered species numbers. Credit Photo by Paul Humann, copyright Grouper Moon Project Usage Restrictions These images are not to be used for anything other than coverage of the Grouper Moon Project 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.