External Territories
Diving in Coral Sea
Beyond the outer Great Barrier Reef the continental shelf drops away and a scatter of isolated oceanic reefs rises from 1,000 m or more of water. Osprey, Bougainville, Holmes, Flinders and Lihou reefs have vertical walls, 40 m-plus visibility, and shark populations that were never fished down. North Horn at Osprey is the best-known shark dive in Australia; the southern reefs are visited by a handful of boats a year.
THE LOCAL PLANNING BRIEF
Understand the options around Coral Sea
What this regional directory records Counts describe published records, not bookable trips or confirmed open sites.
There are 61 published site records in Coral Sea. The recorded categories include wall (27), reef (13), drift (7), pinnacle/bommie (7). These categories reflect the database; they are not a ranking, a conditions report or an assessment of your suitability.
Use the Coral Sea site cards to compare recorded access and depth, then open the individual pages for the map accuracy and source notes. Sites grouped in a region are not necessarily close enough to combine in one day.
Research operators in External Territories →Ask before booking
- Which territory and jurisdiction does this itinerary visit?
- What park or access permissions apply to the exact location?
- What is the contingency if transport changes?
Save the answers with the contact name and date. Separate confirmed arrangements from items still waiting for a reply.
Record your trip questions →Questions, answered
How do I choose a dive in Coral Sea?
Begin with the individual site and its source notes, then discuss the proposed trip with a local provider. The 61 published records are research options, not a list of trips available today. Match the plan to your training, recent experience and the operator’s current requirements.
When should I visit Coral Sea for diving?
Choose dates with a provider who runs the activity you want, then discuss seasonal patterns, recent conditions and alternative itineraries. A generic best-month claim cannot establish the conditions at your exact site or guarantee a wildlife encounter.
Can I use these maps to enter or navigate a dive site?
No. Recorded and approximate map positions support orientation only. Confirm the exact access, permissions, meeting point and route with the responsible local provider or manager.
Regional planning context: Parks Australia — Australian Marine Parks ↗. Directory counts come from published YouDive records. Individual site claims remain subject to their source and review notes.
Dive sites in this region
WallCoral Sea
Nautilus Wall (Osprey Reef)
A wall named for Osprey's isolated dwarf nautilus population, historically the site of dawn nautilus releases for photographers.
Details need confirmationDriftCoral Sea
Northern Lights (Holmes Reef)
A strong-current drift through gutters between very large pinnacles.
Details need confirmationReefCoral Sea
Predators Playground (Holmes Reef)
A historic Coral Sea shark-feed arena on sand at 9 m.
Details need confirmationReefCoral Sea
Scuba Zoo (Boomerang Reef)
A historic caged shark-feed site with four permanent cages on sand at 15 m.
Details need confirmationWallCoral Sea
Silver Slope (Bougainville Reef)
A seldom-described Bougainville Reef site (a list of possible Bougainville sites on Dive the World).
Details need confirmationPinnacle/BommieCoral Sea
Soft Spot (Flinders Reef)
Pinnacles covered in hundreds of colourful soft coral trees.
Details need confirmationWallCoral Sea
Southern Wall (Bougainville Reef)
A seldom-described Bougainville Reef site (a list of possible Bougainville sites on Dive the World).
Details need confirmationWallCoral Sea
The Junkyard (Bougainville Reef)
A seldom-described Bougainville Reef site (marinelife.org.au's list of additional Bougainville sites).
Details need confirmationDriftCoral Sea
The Sticks (Bougainville Reef)
A clear-water wall drift with sharks, rays and schooling fish.
Details need confirmationReefCoral Sea
Trigger Happy (Flinders Reef)
A Flinders Reefs site on Mike Ball's Yongala & Coral Sea expedition.
Details need confirmationWallCoral Sea
West Point (Bougainville Reef)
A seldom-described Bougainville Reef site (marinelife.org.au's list of additional Bougainville sites).
Details need confirmationWallCoral Sea
Whaler Station (Flinders Reef)
A seldom-described site associated with China Wall in the Flinders group.
Details need confirmationIslandCoral Sea
Willis Islets
A remote sunken atoll with a shallow lagoon and the Coral Sea's only inhabited island.
Details need confirmation