Bottlenose Dolphin 2 (IMAGE) PLOS Caption Two bottlenose dolphin males butt heads in Doubtful Sound, New Zealand. Credit Susan Maersk Lusseau, 2002 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.