Sonar Detector (IMAGE) Smithsonian Tropical Research Institute Caption Video still shot of Guzman placing sonar detector in the water to detect manatees. Credit Ana Endara, STRI Usage Restrictions Credit STRI 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.