JOHN MARAVENTANO / SCIENCE PHOTO LIBRARY JOHN MARAVENTANO / SCIENCE PHOTO LIBRARY
Pillar Coral, Dendrogyra cylindrus, gows to 3m (10ft.).Close up, the surface of the coral is covered by a mass of pale brown tentacles that are about 5cm (1/6 in.) long and retract quickly if touched. Photographed in Grand Cayman.
Model release not required. Property release not required.