Silhouette with lights (IMAGE) Macquarie University Caption Lights break up the sillouette of seals into smaller shapes which are more difficult for sharks to identify as prey Credit Macquarie University Usage Restrictions Credit must be given to the creator. No derivatives or adaptations of the work are permitted. License CC BY-ND 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.