Average Depth: 15m (50ft)
Hin Wong Pinnacle
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Maximum Depth: 30m (100ft)
The site consists mainly of large tabletop rock formation with an array of purple soft corals scattered over the surrounding area that give the site its name ("Wong" is Thai for purple).
The rocky plateau is almost completely obscured by anemones, whip corals and finger corals. East of it, the sandy bottom slopes steeply down to the sites maximum depth past other, slightly smaller granite structures.
Blue spotted rays and red coral groupers, banner fish and sergeant majors dominate the resident fish. Fusiliers and snappers are found in large groups in the deeper waters. One of the widest selection of whip and fan corals on Koh Tao.