Ethical Whale Shark Encounters: Where and When to Go

A whale shark in open water is quietly overwhelming. A fish the length of a bus, moving without effort, not interested in you at all. It has also become one of the most marketed wildlife encounters in travel. So the useful question is not where you can swim with whale sharks. It is where you can do it without changing how the animal behaves.

The short answer: the most reliable ethical whale shark encounters happen where sharks gather naturally to feed, and where operators and rangers enforce a written code. The clearest exception is Oslob in the Philippines, where sharks are fed so tourists can see them every day. Everything below is a guide, not a promise. Seasons and rules shift, so check the current rules before you travel.

Why the site matters as much as the season

Whale sharks gather in a few places because they follow food: plankton blooms, spawning events or baitfish. Good encounters depend on operators who work around these natural gatherings. They watch, they enter the water calmly, they keep their distance, and they never touch, chase or feed the animal.

The species needs this care. In 2016 the IUCN Red List moved the whale shark from Vulnerable to Endangered. The assessment inferred a global decline of at least 50 per cent, with a decline of about 63 per cent in the Indo-Pacific and at least 30 per cent in the Atlantic. Targeted fisheries, bycatch, vessel strikes and unsustainable tourism are listed among the main threats.

The counter-example: what feeding does at Oslob

At Oslob, on Cebu, sharks are drawn in with hand-fed shrimp. A 2015 study in PeerJ by Schleimer and colleagues found that sharks arrived at the site earlier over time, which suggests they learn to link the place with food. It also found that non-compliance with the two-metre minimum distance rose from 79 per cent of interactions in 2012 to 97 per cent in 2014. A later study using 2015 to 2017 observations found people within two metres of an animal in 93 per cent of surveys, and linked this to overcrowding.

None of this means the animals look distressed on any given day. It means the behaviour you see is no longer fully natural, and that is different from what most people think they are booking. We explain our position in why we choose wild encounters instead of Oslob, and you will find five practical questions in wild or fed? before a whale shark tour.

Where and when can you see whale sharks ethically?

These are places with well-described natural gatherings. The windows below come from the official or tourism sources I could find, and they change from year to year with ocean conditions, so please use them only to plan.

• Ningaloo Reef, Western Australia. The state environment department (DBCA) says whale sharks are most reliably seen from March to July, and in some years into August, September and October. Operator and archived guides give a minimum of 3 metres from the body and 4 metres from the tail, but I could not confirm the current wording, so check the current DBCA protocols.
• Donsol, Philippines. A travel account describes the season as November to June. Tours carry a trained interaction officer. Sources list no touching, no flash, no scuba or motorised propulsion, and a limit of six swimmers per shark, with a minimum distance of about 3 metres from the shark and 4 metres from the tail. Older research reports found high compliance with the no-flash rule, but those studies are not recent.
• Isla Mujeres and Holbox, Mexico. Travel guides say numbers are usually highest from June to September, with a peak around July and August. The Cabo Catoche gathering near Holbox lies inside a Whale Shark Biosphere Reserve of about 146,000 marine hectares. One older article described the offshore Afuera gathering as unregulated, and I could not confirm whether that has changed. Unlicensed boats are also reported. For these reasons, Ocean Calling does not sell whale shark swims in Mexico.
• Mafia Island, Tanzania. October to March is the usual window for sightings, with local operators organised in a network and a code of conduct. See our guide to Mafia Island whale sharks.

Grey cases: the Maldives and Cenderawasih Bay

Some places are not simple. In South Ari Atoll in the Maldives, a marine protected area was created in 2009. Reports say a 2025 amendment requires registered vessels, a flag, live-location sharing and at most six vessels in the contact zone, and a 2019 study found injuries on 79 per cent of resident sharks, mainly from boat strikes. Good news about rules, and a warning about what happens without them. You can read more in South Ari whale sharks: scars, propellers and the new rules.

In Cenderawasih Bay, Indonesia, sharks gather around fishing platforms called bagans, where fishers use lights to attract baitfish and the sharks feed on them. Visitors pay a fee into a village fund, and a written code asks guests not to touch the animals. But one study of 268 sharks across four areas in West Papua found that 80.6 per cent of injuries were human-caused, mostly collisions with bagans and tour boats. I would call this a grey case, not a clear yes. We cover a similar setting in Saleh Bay, Sumbawa.

What an ethical encounter looks like in the water

In every region, the operators worth booking behave in a similar way. They place the boat ahead of the shark’s path instead of chasing it, limit the number of swimmers, enforce distance, and never touch, ride or feed the animal. The details change from place to place, so ask for the written code.

A few simple things help you do your part. A low-volume mask and snorkel makes it easier to float quietly and relax. A long-sleeved rash guard keeps the sun off during the long wait on the boat. And a roll-top dry bag keeps a phone and a layer dry. None of this makes an encounter more likely. It only makes the waiting comfortable.

Where Ocean Calling stands

Whale shark encounters are never guaranteed. Ocean Calling never chases, touches, rides or baits whale sharks or any other marine wildlife, and we do not book feeding-based sites like Oslob. We would also rather not sell a swim where the rules are unclear. Wildlife encounters are unpredictable. Swimming with whale sharks should always follow local regulations and experienced professional guidance. For the bigger thinking behind this, see why ethical operators sometimes choose not to enter the water and why marine protected areas succeed or fail.

If this made you curious about meeting the ocean with more care yourself, you can explore our upcoming retreats.

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.