Oslob Whale Sharks: Why We Choose Wild Encounters

Most people who go to Oslob simply want to see the biggest fish in the sea up close. That wish is beautiful, and this is not a story about bad travellers. It is a story about what happens to a wild animal when the food always arrives at the same place, at the same time.

So, the short answer to the question behind this page: Oslob is a feeding site, the research on it raises real welfare questions, and the Philippines has other places where whale sharks are not fed. We prefer those, and we will tell you honestly that they are less predictable.

A wanderer that learned an address

Whale sharks are wanderers. They follow plankton, the tiny drifting life of the sea, over big distances, and their day is normally shaped by where that food happens to be. At Oslob the sharks are fed daily, all year round, and a 2020 scientific paper says the site receives more than 500,000 visitors a year.

An earlier study by Schleimer and colleagues, published in 2015, followed individual sharks with photo-identification. Newly identified sharks arrived at the feeding site earlier and earlier after their first sighting. The authors read this as the animals learning to link the place with food. It is a bit like a street dog that learns which door opens at lunchtime, only this time it is the largest fish in the world.

What staying put might cost

A 2017 study by Thomson and colleagues counted 208 individual sharks at Oslob over three years, with an average of 18.6 sharks seen per week. Every animal had its own pattern: some came once, some now and then, some seasonally, and nine became year-round residents. For a species that normally travels far, the authors saw that as a clear response to being fed.

They also raised a worry. If a shark stays for long periods, it spends less time looking for natural food. The authors argue this could affect foraging success and where the sharks go, and might even lead to dependency later in life. Here I want to be careful. They present these as risks to study, not as proven harm, and reports on the study say the longer-term effects on such a migratory animal need more research. Honest science sounds like this: we do not fully know. What we do know is that the animals changed their behaviour.

Too many people in one small piece of sea

The same 2020 study, by Legaspi and colleagues, followed sharks in the water between February 2015 and May 2017 and also checked whether visitors kept the local code of conduct. People were within 2 metres of the animal in about 93 percent of the surveys, which the authors link to overcrowding. Their conclusion: management has to improve, both to raise compliance and to move towards more sustainable tourism.

So the problem is not that nobody wrote rules. The problem is that a model built on feeding brings the animals to the people, and with so many swimmers around, the rules are very hard to keep. I want to say this kindly: most visitors are simply doing what the boat crew shows them.

Is feeding whale sharks allowed in the Philippines?

The Philippines has national rules for marine wildlife tourism, in Joint Memorandum Circular No. 01, series of 2020. It was issued by the Department of Tourism together with the departments of environment, agriculture and interior. It covers marine wildlife tourism in natural habitats, sets up no-approach, interaction and waiting zones, and includes a code of conduct for people and boats. Local reports say feeding is not allowed under it.

I could not find the circular's exact whale shark distances in the sources I could reach, so I will not quote a number. Rules change and local offices can add their own, so please check the current rule before you travel.

Where whale sharks are still wild: Donsol and Pintuyan

The good news is that the Philippines also has places where whale sharks are not fed. In Donsol, in Sorsogon, visitors go out with spotters and snorkel only. Local guides describe a limit of six swimmers per shark and one boat per shark. Sources do not fully agree on the wording, since some describe the six-swimmer limit per boat, and reporters have also written that the code has been broken many times. Ask your operator how it is applied that day.

Pintuyan, in Southern Leyte, is a quieter option. The local rules prohibit feeding, baiting and touching. Sources give slightly different seasons, roughly October or November to May. The municipality closed its 2026 season on 1 June, with the next one planned to open on 1 October. I did not find confirmation that it has opened, so please ask the tourism office.

And here is the honest part. Wild means unpredictable. Visibility can be low, and some days you see nothing at all.

The conservation layer: an Endangered animal

The whale shark is listed as Endangered on the IUCN Red List. The assessment estimates a global decline of around 50 percent over three generations, about 75 years. The main pressures are fishing, bycatch, boat strikes and unmanaged tourism. When a species is already under this much pressure, how we watch it matters more, not less.

Travel also has a cost. Flights to the Philippines are a big part of any trip's footprint, so we prefer fewer, slower and longer visits, in small groups.

Why we choose wild

Because the best encounter is the one the animal chooses. A wild whale shark that glides past you and keeps going towards the plankton is the real thing. It does not stop for you, and that is why it feels like a gift. If you meet one, float calmly at the surface, keep your distance, never touch it, never chase it and never swim into its path. A well-fitting low-volume mask and snorkel makes it easier to stay relaxed and still, and a rash guard keeps the sun off your back during a long, slow float.

Wildlife encounters are unpredictable. Swimming with whale sharks should always follow local regulations and experienced professional guidance.

Cebu is also where our Moalboal referral trip happens, through Ocean Match with a vetted local team, and Oslob is not part of it. If this made you curious about meeting the ocean this way, you can explore our upcoming retreats. You can also read our guide to how to tell a wild whale shark tour from a fed one.

Questions people ask

Why don’t you include Oslob in your trips?

Because the encounters there are built on daily feeding. Research found that sharks learned to link the site with food, that some stay for long periods, and that visitors were within 2 metres of the animals in about 93 percent of surveys.

Is feeding whale sharks illegal in the Philippines?

The national circular on marine wildlife tourism (JMC 01, 2020) sets a code of conduct, and local reports say feeding is not permitted under it. Oslob has its own local arrangements, and I could not verify how they are applied today, so please check the current rule before you travel.

Where can I see wild whale sharks in the Philippines?

Donsol in Sorsogon and Pintuyan in Southern Leyte are places where whale sharks are not fed. Seasons run roughly from October or November to May, and some days you may see nothing.

Does feeding really harm the sharks?

Nobody has proven long-term harm, and the researchers say more study is needed. They did document changed behaviour, with some sharks becoming year-round residents, and they raise concerns about less natural foraging.

How close can I get to a whale shark?

It depends on the site and the rule that day. The Oslob studies refer to a 2 metre distance in the local code. Follow your guide, never touch, and let the shark decide how close it comes.

Are whale sharks endangered?

Yes. The IUCN lists the species as Endangered, with an estimated decline of about 50 percent over three generations (around 75 years).

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.

Sources & further reading

1. Legaspi et al. (2020). In-water observations highlight the effects of provisioning on whale shark behaviour at the world’s largest whale shark tourism destination. Royal Society Open Science 7:200392. PubMed Central
2. Joint Memorandum Circular No. 01, series of 2020, on rules and regulations governing marine wildlife tourism interactions in the Philippines. DOT, DENR, DA, DILG. FAOLEX / ECOLEX record
3. Philippine News Agency (2021). DOT to tourists: Interact responsibly with marine wildlife. pna.gov.ph
4. Schleimer et al. (2015). Learning from a provisioning site: code of conduct compliance and behaviour of whale sharks in Oslob, Cebu, Philippines. PeerJ 3:e1452. peerj.com
5. Thomson et al. (2017). Feeding the world’s largest fish: highly variable whale shark residency patterns at a provisioning site in the Philippines. Royal Society Open Science 4:170394. PubMed Central
6. Philippine Daily Tribune (3 June 2026). Pintuyan ends whale shark interaction season. tribune.net.ph
7. SunStar. Swimming with whale sharks in Donsol (visitor guide listing the on-water rules). sunstar.com.ph
8. Vera Files. The downside of success: too many tourists in Donsol. verafiles.org
9. Australian Geographic (2016). Vulnerable to endangered: whale sharks one step closer to extinction (reporting the IUCN reassessment). australiangeographic.com.au

Further reading on Ocean Calling: Wild or fed? 5 questions to ask before a whale shark tour · Ethical whale shark encounters around the world · Oslob whale sharks: the ethical issues · The Philippines in the Ocean Atlas