Prime Predators of the Baltic Sea (IMAGE) Stockholm University Caption The prime predators of the Baltic Sea, as grey seals, are losing weight, shows a new study from the Swedish Agricultural University and Stockholm University. Credit Olle Karlsson 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.