Bigeye Tuna (<i>Thunnus obesus</i>) (IMAGE) University of California - Santa Barbara Caption This image shows a bigeye tuna (Thunnus obesus). Credit UCSB Usage Restrictions None License Licensed 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.