Lionfish (image) Wildlife Conservation Society Share Print E-Mail Caption This image shows a trio of lionfish in the southwestern Indian Ocean. A WCS study found that reefs containing more than 600 kilograms of fish biomass per hectare are most likely to retain their species richness over time. Credit Tim McClanahan/WCS Usage Restrictions One-time usage only Share Print E-Mail 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.