Megadolon (IMAGE) University of Zurich Caption The reconstructed megadolon (Otodus megalodon) was 16 meters long and weighed over 61 tons. It was estimated that it could swim at around 1.4 meters per second. Credit J.J.Giraldo Usage Restrictions none 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.