Bottlenose dolphins (IMAGE) Species360 Caption Common bottlenose dolphins at Planète Sauvage, France. Study authors examined 200 years' worth of data on four marine mammal species including bottlenose dolphins and found that their life expectancy has increased by over three times, and is currently two to three times longer than their counterparts in the wild. Credit A. Monnier – Planète Sauvage, France Usage Restrictions Please credit photographer License Original 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.