Family Crucial to Orca Survival (IMAGE) CNRS Caption The unique dorsal fin and saddle patch of each orca enables tracking by photo-identification. Credit Yvon Gouedard 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.