Low-tide @ Gilli Trawangan

Step carefully - these colonial corals are modern-day reef-builders

that protect islands and harbor huge populations of marine life. The

symbiotic algae that allows them to turn sunlight into food is very

delicate. This was taken off the edge of a sea-grass/sand-bar, at

low-tide, where the hard corals start to grow. This little one is

just a few years old, approximately 5cm in diameter.