Small Parrotfish Swims through Enclosure (IMAGE) Penn State Caption A small parrotfish swims through an opening in a coral enclosure. The enclosure excludes larger parrotfish from accessing the corals to feed on algae allowing researchers to test the impact of selective fishing on coral health. Credit Andrew Shantz, Penn State 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.