Tiger shark (© Dirk Krüßmann) (IMAGE) University of Vienna Caption Tiger shark (© Dirk Krüßmann) Credit © Dirk Krüßmann Usage Restrictions Credit must be given to the creator. License CC BY 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.