Johor
The Johor Marine Park islands comprise of Pulau Rawa, Pulau Besar, Pulau Hujung, Pulau Tengah, Pulau Tinggi, Pulau Pemanggil, Pulau Sibu, Pulau Aur and Pulau Dayang. The furthermost islands - Pulau Dayang and Pulau Aur - offer the most interesting diving of the Johor Marine Park islands. Surrounded by deep waters, the two islands offer an excellent opportunity to encounter pelagics.

Pulau Aur
Located towards the east of Mersing about 65 kilometres from the mainland is Pulau Aur. The long boat journey of about 4 /2 hours is rather tiresome, and most operators opt to depart in the late evening, travelling through the night to arrive the next morning on the island. If the seas are rough the boat ride could take a little longer.

Pulau Lang, Pulau Pinang and Pulau Dayang (the largest of the three) surround Pulau Aur. The rich pelagic action also attracts numerous sport fishermen, hoping to try their luck with the marlins or sailfish outside the marine park island.

Rayner's Rock
Towards the northeastern tip about 200 metres of Pulau Dayang is Rayner's Rock, a solitary large boulder breaking the surface at about 4 metres high. Diving is good around the eastern portion with a mixture of both hard and soft corals providing shelter for a profusion of marine life. You can expect to encounter schooling yellowrails, rainbow-runners, trevallies and closer to the reef, groupers, damsels, butterflyfish, scorpionfish and lots of shells.

Pinnacles
This submerged reef is located towards the south of Pulau Aur and Pulau Pinang. The top of the reef begins at about 12 metres and slopes in excess of 25 metres. If dived under the right circumstances with slight currents, a large number of pelagics including jacks, fusiliers, barracudas and black tip sharks can be sighted. Among the hard corals and scattered soft corals are wrasses, pufferfish, damsels, lionfish, snappers and in between rocky crevices and lobsters.