Giant mottled eel (IMAGE) University of Guam Caption Guam’s most common river eel — the giant mottled eel, or marbled eel (Anguilla marmorata). Credit University of Guam Usage Restrictions For use with publication of this article only 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.