Fragile Environment (IMAGE) National Oceanography Centre, UK Caption This is an aggregation of seastars, Odontaster validus, at McMurdo Sound, Antarctica, 32 m depth. Also visible are giant ribbon worms, Parborlasia corrugatus. The unique seafloor communities of Antarctica are threatened by human disturbance. Credit Photo by R. B. Aronson Usage Restrictions Please credit R. B. Aronson 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.