Cod (image) University of Southampton Share Print E-Mail Caption Researchers have now shown that fish such as these Atlantic cod are carrying around an internal fitness watch which records the pace of life (the metabolic rate) of the fish. This information can be used to show how fish respond to climate change and fishing pressure. Photo: Peter Grønkjær Credit Peter Grønkjær Usage Restrictions Credit Peter Grønkjær Share Print E-Mail 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.