Whitetip Reef Shark (IMAGE) Bigelow Laboratory for Ocean Sciences Caption A whitetip reef shark patrols a Fijian coral reef lagoon at high tide. In a recently published study, researchers from Bigelow Laboratory documented the first clear example of sharks causing cascading changes among other sea life in this ecosystem. Credit Bigelow Laboratory for Ocean Sciences 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.