Image 1 (IMAGE) The University of Hong Kong Caption Epinephelus fuscoguttatus, a type of brown marbled grouper which is listed as vulnerable and decreasing according to The International Union for Conservation of Nature (IUCN) were detected in the study. Credit The University of Hong Kong Usage Restrictions This work is licensed for non-commercial, non-exclusive, one-time usage with attribution to the copyright holder. License Original 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.