Scuba Diving in Apo Reef

Diving in Apo Reef

Diving in Apo Reef means diving one of the wildest reefs in the Philippines. This is the largest contiguous coral reef in the country, often ranked second in the world only to Australia's Great Barrier Reef, and it sits alone in the Sulu Sea off Occidental Mindoro. The park is built from two triangular, atoll-like coral formations, each with its own inner lagoon, split by a sandy channel around 30 m (100 ft) deep. Its outer edges fall away as sheer walls from the shallows down to 30 to 80 m (100 to 260 ft), and around 400 kinds of coral and hundreds of species of fish live on them.

The draw here is big animals in current-swept blue water. Whitetip, blacktip, and grey reef sharks patrol the walls, manta rays and eagle rays cruise past, and the offshore seamounts pull in barracuda schools, tuna, and the occasional hammerhead. Because Apo Reef is remote, most divers come by liveaboard, though a handful of operators run long day trips from Sablayan and the Pandan Islands on Mindoro, roughly two hours by boat each way. Visibility can top 40 m (130 ft) in the dry season, and the calmest, clearest window runs December to May. This is exposed, current-driven diving, so it rewards divers with some experience under their belt.

Best dive sites in Apo Reef

The best dive sites in Apo Reef sit on its outer walls and the offshore pinnacles nearby, where current concentrates the sharks and pelagics. Here are four worth the journey.

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Shark Ridge

Shark Ridge, on the northwestern edge of the main reef plateau near the lighthouse islet, is the site most liveaboard guests rate as their favorite. The ridge slopes down to around 25 m (82 ft) and is one of the most reliable places in the park for close-up shark action, with blacktip and whitetip reef sharks resting and cruising the slope. Manta rays often glide through the area too.

• Depth: 12–25 m (40–82 ft)
• Visibility: 20–40 m (66–130 ft)
• Current: Moderate to Strong
• Level: Intermediate
• Key species: Whitetip reef shark, blacktip reef shark, manta ray, reef fish

Apo 29 (Barracuda Hill)

Apo 29, also called Barracuda Hill, is a seamount whose shallowest point sits at 29 m (95 ft). It's a deep, current-swept dive for confident divers, and if you can hold your position in the flow, the reward is huge schools of barracuda and multiple shark species patrolling the blue. This is one for divers comfortable with depth and current.

• Depth: 29–40 m (95–130 ft)
• Visibility: 20–40 m (66–130 ft)
• Current: Strong
• Level: Advanced
• Key species: Barracuda, grey reef shark, whitetip reef shark, jacks

Hunter's Rock

Hunter's Rock is an underwater pinnacle about 10 km (6 mi) west of the reef, and it takes the pelagic action up a notch. Sharks, tuna, and big trevallies work the seamount, and it's one of the more unusual sites in the country: banded sea kraits gather here to mate in June and July, and hammerheads pass through most often from November to March.

• Depth: 10–35 m (33–115 ft)
• Visibility: 20–40 m (66–130 ft)
• Current: Moderate to Strong
• Level: Advanced
• Key species: Grey reef shark, hammerhead shark, tuna, giant trevally, banded sea krait

Binangaan Drop-off

Binangaan Drop-off, near the lighthouse islet on the reef's edge, is a classic Apo Reef wall dive. You drift along a vertical face that plunges past recreational limits, watching the reef sharks work the drop while turtles, Napoleon wrasse, and clouds of fusiliers move over the coral. It's a scenic, less demanding option than the offshore seamounts, so it's a good way to open a trip.

• Depth: 10–30 m (33–100 ft)
• Visibility: 20–40 m (66–130 ft)
• Current: Moderate
• Level: Intermediate
• Key species: Whitetip reef shark, Napoleon wrasse, green turtle, fusiliers, eagle ray

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Best time to dive Apo Reef

The best time to dive Apo Reef is the dry season, roughly December to May, when the Sulu Sea settles and visibility is at its best.

Apo Reef can be dived most of the year, but December to May gives you the calm seas and 40 m (130 ft) visibility the reef is known for. Hammerheads are most likely from November to March, while the sea-krait aggregations at Hunter's Rock happen around June and July.

Diving conditions in Apo Reef

Marine life in Apo Reef

Marine life in Apo Reef is what you'd expect from a huge, remote reef that current keeps well fed: around 400 types of coral, hundreds of species of fish, and a steady cast of sharks and pelagics along the walls. This is shark-and-big-fish diving, with the coral cover to match.

• Sharks: Whitetip, blacktip, and grey reef sharks, plus seasonal hammerheads
• Pelagics: Manta rays, eagle rays, tuna, giant trevally, and barracuda schools
• Reef dwellers: Napoleon wrasse, green and hawksbill turtles, and dense hard and soft coral

Reef sharks (whitetip, blacktip, grey): year-round, especially around Shark Ridge.

Hammerhead sharks: November to March, especially around Hunter's Rock.

Banded sea kraits (mating aggregations): June to July, especially around Hunter's Rock.

Apo Reef is a protected Natural Park and a candidate UNESCO World Heritage Site, and its recovery is a genuine conservation story after years of dynamite and cyanide fishing were stopped. Divers pay a conservation fee that funds ranger patrols and reef protection, and no-take rules keep the fish life dense. Careful buoyancy and no-touch practices matter here, since the walls are covered in fragile hard and soft coral.

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Practical information

Dive prices

• Fun dives: Usually sold as liveaboard or multi-day day-trip packages rather than single dives
• Liveaboard: Multi-day trips are the most common way to dive Apo Reef, often combined with Coron or Puerto Galera
• Park/permit fees: An Apo Reef conservation fee of around USD 35 per person applies (roughly ₱2,940 for foreign visitors)

Getting there

Apo Reef sits offshore from Occidental Mindoro, and there are two main ways to reach it. Most divers join a liveaboard, often on an itinerary that links Apo Reef with Coron or Puerto Galera. The alternative is to base yourself in Sablayan or on the Pandan Islands on Mindoro and take day trips out to the reef, around two hours by boat each way. Mindoro itself is reached by ferry from Batangas, about 2.5 hours south of Manila.