Dyrosaurid Swimming (image) University of Bristol Share Print E-Mail Caption This is a marine crocodilian, here a dyrosaurid, swimming in the warm surface waters during the end of the Cretaceous period. Credit Guillaume Suan Usage Restrictions Please note: all images are for single use only to illustrate this press release and are not to be archived. Please credit the copyright holder in each instance. Share Print E-Mail 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.