Fishy cousins (IMAGE) Flinders University Caption Cranial endocast of a Palaeozoic lungfish Credit Courtesy A Clement, Flinders University Usage Restrictions Courtesy A Clement, 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.