AdvancedAustralia · Asia Pacific
Osprey Reef
A Coral Sea seamount and a shark wall.
- Best time
- Oct – Dec
- From
- US$214/day

An oceanic atoll for hammerhead season.
The dive
A remote man-made island on an oceanic atoll in the South China Sea: 2,000 m walls, gin-clear water and the spring chance of schooling hammerheads.
When to go
The atoll resort opens roughly March–August; March–May carries the best scalloped-hammerhead odds in the blue.
Readiness
Advanced-level site — suits Advanced Open Water divers and up. Typical requirements:
Not sure you're ready? Read our readiness guide or check yourself in the planner.
Logistics
| Getting there | Charter flight from Kota Kinabalu; seasonal. Charter flight from Kota Kinabalu (BKI) direct to the atoll's airstrip; one resort only. |
|---|---|
| Where to stay | Single remote island resort. The single island resort — remote, no-frills, all about the wall. |
| Operator to look for | Reviewed resort dive team running the seasonal wall and shark dives. |
Sources
Links checked 29 September 2026. They cover the site's location, protection status and background. Costs, difficulty and season windows are ScubaRogue's editorial estimates, so confirm them with your operator before you book. How we research
Keep exploring
AdvancedAustralia · Asia Pacific
A Coral Sea seamount and a shark wall.
AdvancedMalaysia · Asia Pacific
A turtle-and-barracuda island in the open ocean.
AdvancedPhilippines · Asia Pacific
A UNESCO atoll only liveaboards reach.