Dr. Marta Guerra Tracking Sperm Whales (IMAGE) University of Otago Caption This is Dr. Marta Guerra tracking sperm whales off the coast of Kaikura, New Zealand. Credit Marine Mammal Lab, University of Otago 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.