Keyhole Pinnacles

Keyhole Pinnacles is formed by four volcanic pinnacles rising from about 18–20 m to within a few metres of the surface, with summits as shallow as 1–2 m. The coral-encrusted towers are covered in brightly coloured black and orange gorgonian fans, barrel sponges, soft corals and hard corals, creating a reef-like formation within roughly 150 m and making the site a very popular, frequently dived pinnacle location inside a marine management area with mooring buoys and no fishing. The site is accessed by boat via a mooring buoy and is typically done as a drift dive, usually beginning to the east with the boat drifting overhead while divers move westward, looping around the pinnacles. The pinnacles rise from roughly 18–20 m and the dive’s maximum depth is around 20–30 m; visibility is usually good and water temperatures are roughly 26–29 °C year-round. Currents are commonly moderate, with possible strong surface currents or surge, and boat traffic near the shallow summits is a hazard, so divers use surface markers; the dive is entirely open water with no overhead environment or wreck.