A Coral Sea seamount and a shark wall.
The dive
An isolated seamount with 1,000 m walls, 40 m visibility and the famous North Horn amphitheatre where reef sharks gather in the blue.
When to go
The Coral Sea is at its clearest and calmest in the spring window; liveaboard-only and weather-dependent.
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 | Domestic flight + ~350 km Coral Sea crossing. Fly to Cairns (CNS) and join a Coral Sea liveaboard; Osprey sits ~350 km offshore. |
|---|---|
| Where to stay | Liveaboard only. Liveaboard only — a remote seamount far from the mainland reef. |
| Operator to look for | Reviewed Coral Sea liveaboards running the North Horn shark dive responsibly. |
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
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