Salmon Shark (IMAGE) University of California - Santa Barbara Caption The salmon shark is one of four shark species that can raise their internal temperatures higher than that of the surrounding water. Credit Yutaka Sasaki 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.