Great Astrolabe Outer Wall

The outer wall of the Great Astrolabe Reef drops precipitously from the reef crest at 5 metres into the deep blue of the Koro Sea, forming a near-vertical curtain of hard and soft corals that ranks among Fiji's most spectacular wall dives. Sea fans of vivid purple and yellow fan out perpendicular to the current, hosting pygmy seahorses in their branches, while the wall itself is punctuated by overhangs draped in black coral and sponges. Pelagic traffic is constant — tuna, wahoo, and occasional silvertip sharks pass in the blue water just off the wall face.