MiIln Reef

  • Location Latitude 16°47.5 Longitude 146°16
  • Depth 5-25 metres
  • Visibility 15 – 20 metres
  • Access boat
  • Size 370 hectares


Milln Reef is 56 kilometres east of Cairns.  This site offers good visibility and is popular with snorkelers and scuba divers.


Shallow coral gardens are outstanding for snorkelers. Along the coral reef, you will see an abundance of brightly coloured tropical reef fish.

Scuba diving

Milln Reef offers excellent wall dives, pinnacles and swim-throughs. Milln is great for night diving. Some of the walls are full of sleeping parrotfish in their mucus sacks, turtles and barracudas and the occasional bull ray.


Dive Sites

Milln Reef dive sites include Three Sisters and the Whale dive site.

Three sisters is a series of three large bommies at the back of this reef.  These sites include Whale Bommie, the Desert and Petaj with Swimming Pools nearby.   The deepest of the three sisters is 33 metres off the sand on the Northeastern side.

Whale Bommie provides good diving with depths exceeding 20 metres. A great site to dive at night, where you can expect to see sleeping turtles, reef crabs, painted lobsters, soft corals and gorgonian fans.

Keep an eye out for a superb stand of black coral on the bommies deepest side.  Next, head to the east to see white tip reef sharks.  The second sister is about 19 metres which are ideal for divers to explore the base of this bommie.

While scuba diving in this location, see sand dwellers, including blue-spotted lagoon rays and sharks.

Close by to the second bommie is the third bommie, about 3 metres apart. Here you can see schools of fusiliers and snappers.   Scuba divers have your cameras ready to capture the brilliant yellow gorgonians that grow along this wall.

There is also a swim-through on the north side of the first of three sisters.

Prodive and Silverswift visit this reef site. Book your trip today to dive into this impressive reef site.

Milln Reef Map

Reefs Nearby