Invasive crustose coralline algae (IMAGE) Woods Hole Oceanographic Institution Caption Invasive crustose coralline algae (yellow/brown color) that has overgrown reef corals in the Virgin Islands National Park in St. John. A WHOI-led study found this alga released caffeine in high quantities, impacting healthy reef growth Credit Cynthia Becker Usage Restrictions For use with proper caption and credit. 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.