East of Eden

Khao Lak · Phang Nga · Thailand

East of Eden occupies the sheltered eastern flank of Similan Island 7, where a gentle coral slope descends from the shallows to thirty metres over white sand. While the western Similan sites draw attention with granite boulders and surge channels, East of Eden offers the archipelago's finest coral gardening, a reef so healthy and diverse that it regularly appears on lists of Thailand's best dive sites despite lacking the dramatic topography of its neighbours. Our liveaboard anchored in the calm lee of Island 7 at dawn, the granite peaks silhouetted against a pink sky. The descent from the tender revealed the reef's character immediately. From five metres to the sandy base at thirty, the slope is carpeted in hard coral of extraordinary density. Table corals overlap in tiers, some spanning three metres across, their surfaces alive with damselfish and chromis that scatter at a diver's approach but reform within seconds. At twelve metres I paused beside a barrel sponge that stood taller than me, its rough ochre cylinder hosting crinoids and tiny gobies. These sponges are scattered across the slope like ancient pillars, some estimated to be decades old in this protected environment. Between them, staghorn coral forests create labyrinths where Oriental sweetlips hover in small groups, their spotted patterns breaking up against the dappled background. A leopard shark rested on a sand patch at twenty-two metres, its spotted body perfectly camouflaged against the substrate. The guide motioned us to approach slowly, and we settled on the sand within four metres. The shark remained motionless, gills pulsing, for two full minutes before lifting lazily off the bottom and gliding into the blue with unhurried wingbeats. The mid-reef zone between fifteen and twenty metres held the greatest diversity. Porites bommies the size of small cars supported miniature ecosystems, their surfaces encrusted with Christmas tree worms in electric blue and orange. Schools of powderblue surgeonfish swept along the reef face in disciplined ranks, their bodies such an impossibly vivid blue that they seemed almost artificial. Hawksbill turtles fed on sponges at multiple points along the slope, so accustomed to divers that they continued eating as we hovered alongside. The safety stop at five metres was spent over a shallow coral garden where clownfish defended their anemone homes and a giant moray extended its full two-metre length from a crevice, jaw agape at a cleaning station. East of Eden delivers no single breathtaking moment but rather a sustained sixty minutes of reef perfection that leaves a deep impression of what a healthy tropical reef should look like.