Malapascua Thresher Sharks: Why the Dawn Dive Has Changed

Picture yourself hovering very still near the reef in the half light, breathing slowly, looking into the blue. Maybe a shape appears at the edge of your vision. Maybe it does not.

The short answer to what changed: threshers are now reported at the shallower Kimud Shoal in the morning, not only at Monad Shoal at dawn. To understand why divers ever waited like this, we need to start with a small fish and a big shark.

Why divers once left before sunrise

Monad Shoal is a submerged island. It rises from about 200 m on the seafloor to within 20 m of the surface, and it became a marine protected area in 2002. Its top is a plateau at 15 to 25 m, and on that plateau are cleaning stations.

A cleaning station is a small patch of reef where cleaner fish wait for larger animals and pick parasites from their skin. At Monad, researchers recorded two cleaners working on the threshers: the bluestreak cleaner wrasse and the moon wrasse.

That study ran remote video cameras for 1,230 hours, between July 2005 and December 2009, and logged 97 cleaning events. Threshers came at all times of day, but their visits slowly became less frequent from morning to evening. That is part of why the early dive became a ritual.

A diving journalist described the classic version: a 4 a.m. briefing, a dark boat ride, a descent without strobes, and a wait behind ropes placed to give these very shy sharks a comfortable approach. The same writer was honest about what waiting means. Threshers can appear like ghosts at the edge of your vision, not appear at all, or turn away. That honesty matters more than any photograph.

What changed at Kimud Shoal

Kimud is a different shoal nearby, so please do not use it as another name for Monad. According to a 2025 report in the diving magazine of Divers Alert Network, the threshers moved to the much shallower Kimud Shoal during the pandemic years.

There, sharks are now found at about 12 to 15 m. That allows longer and safer dives with more natural light, and encounters are reported during the morning hours.

For you as a guest, it means a dive may not need the very early start people remember, and it may happen in brighter water. But this is what divers observe on the site, not a biological rule. Sharks change their habits, and a morning with no thresher is still a real morning in the ocean. Before you go, ask your dive team which shoal they will visit, at what depth, and why.

Why does a deep-water shark come up to a reef?

Pelagic threshers usually live in open water, so the cleaning station is a meeting point between two worlds. In the early study, most interruptions of cleaning had natural causes. But some were caused by scuba divers arriving, on a seamount that recreational divers visit most days.

A cleaning visit is the shark’s own business. There is no reason to swim into the station for a better angle, and every reason to stay where you are.

And that long tail is not decoration. Off Pescador Island, further south in Cebu, researchers filmed threshers hunting sardines. They recorded 25 hunts, 22 of them with an overhead tail-slap. On average, a successful slap stunned 3.6 sardines.

A protected shark with a slow life

Dives like these can make threshers seem common. They are not. The pelagic thresher is listed as Endangered on the IUCN Red List, and it has been on Appendix II of the Convention on Migratory Species since 2014. Around Malapascua, Monad Shoal also became part of the Philippines’ first shark and ray sanctuary in 2015.

Protection you can read in a report is not the same as protection you can see in the water. The Important Shark and Ray Areas factsheet from the IUCN Shark Specialist Group describes Monad Shoal and Kimud Shoal as two marine protected areas. I could not find the official local ordinance for Kimud, so I cannot tell you its exact rules, and rules posted by dive centres are not the law itself. Please check the current rule with the local government or your dive team before you dive, and ask how they manage the number of divers on the shoal. Visitors help most when their presence is calm and limited. Wildlife encounters are unpredictable. Diving with thresher sharks should always follow local regulations and experienced professional guidance.

Is this a snorkel or freediving encounter?

No. We treat Malapascua thresher sharks as a scuba experience, for certified divers who are comfortable holding their depth. We would not describe it as snorkelling with sharks or as a freediving trip.

Before any dive, confirm the site, the certification you need, the conditions, the group size and the local rules with a licensed team.

How to wait for a shark

The advice from people who dive here is quiet and physical. Be patient, stay quiet, keep almost still and hover horizontally, and breathe softly and regularly. Leave strobes and lights off. The classic Monad dive is done without them, so if you bring a small underwater camera, use natural light and accept that the best moment may not end up in the frame.

Let the animal choose the distance. Never chase, touch, bait or block a shark, and never swim into a cleaning station. Good teams keep groups small, brief you before you enter, and are happy to end a dive early if conditions or behaviour change.

You can meet the animal first on our pelagic thresher page. And if Cebu is on your mind, our Moalboal trip with a vetted local team is also in Cebu. It is a referral through Ocean Match, where you book the local team directly, not a hosted retreat.

Questions people ask

Wildlife encounters are never guaranteed and never forced. Ocean Calling works only with vetted, ethical local operators, and every animal is free to approach, or not, entirely on its own terms.