Group of Killer Whales (IMAGE) American Genetic Association Caption Recent research sheds light on stock structure of these apex predators in the northern North Pacific Ocean, with important implications for management. Credit Km M. Parsons, National Marine Mammal Laboratory, NOAA Fisheries 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.