Mesozoic marine tetrapod ecospace (image) University of Bristol Share Print E-Mail Caption Mesozoic marine tetrapod ecospace. Animals in each group share ecological characteristics. They came in many shapes and sizes and had great variation in feeding apparatus. Credit Tom Stubbs, University of Bristol Usage Restrictions Single use only - with press release 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.