A Bottlenose Dolphin with a Sponge (IMAGE) University of New South Wales Caption Some bottlenose dolphins in Shark Bay in Western Australia put sponges on their rostrums to use as tools to forage. A study of the dolphins has shown social behavior can shape the genetic makeup of this wild animal population. Credit Image: Simon Allen Usage Restrictions In association with a report on the research 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.