Blue whale underwater (IMAGE) Save Our Seas Foundation Caption Blue whales are the largest living animal on this planet. The largest accurately measured blue whale was a 29.5 metre female. Photo © Phillip Colla | Oceanlight.com Credit Photo © Phillip Colla | Oceanlight.com Usage Restrictions Images are to only be used with the associated press release. 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.