Manatee in Gatun (IMAGE) Smithsonian Tropical Research Institute Caption By the end of 1965, eleven manatees were freely feeding throughout the Panama Canal after the fence in the semi-enclosed area where they had been placed was broken. Credit Unidad de Memoria Histórica del Canal de Panamá Usage Restrictions Credit must be given to the creator. Only noncommercial uses of the work are permitted. No derivatives or adaptations of the work are permitted. License CC BY-NC-ND 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.