Male Sperm Whale Tiaki (Guardian) (IMAGE) University of Otago Caption Male sperm whale Tiaki (guardian) in the waters near the Kaikura coastline. 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.