Karina Mejia (IMAGE) University of Guam Caption Karina Mejia holds a freshwater eel. For her master’s biology thesis at the University of Guam, she is looking into the genetics and migration of Guam’s most common river eel. 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.