Cladarosymblema narrienense (IMAGE) Flinders University Caption Sketch of a Cladarosymblema narrienense, a type of large, predatory 'megalichthyid' fish, a group which existed from the Devonian-to-Permian periods. Credit Courtesy John Long, Flinders University Usage Restrictions Courtesy John Long, Flinders University 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.