Oslob and Sumilon
The world's biggest fish, guaranteed every morning, and an honest look at why that worries scientists.
Quick answer
- Where: the village of Tan-awan in Oslob, at the southern tip of Cebu, about 120 km from Cebu City.
- What happens: boatmen feed small shrimp to whale sharks each morning, so visitors can snorkel near them.
- The debate: conservationists warn that feeding changes the sharks' natural behaviour and migration and puts them at risk from boats.
- The rules: no touching, no flash photos, keep your distance and attend the briefing.
- Nearby: Sumilon Island's sandbar and marine sanctuary, and Tumalog Falls.
Why it is a wonder
The whale shark, or butanding, is the biggest fish in the world, a gentle filter feeder that can grow longer than a bus. Off the village of Tan-awan in Oslob, at the southern tip of Cebu, whale sharks appear almost every morning, so close to shore that visitors can snorkel beside them.
They come because they are fed. Since around 2011, local boatmen have fed them small shrimp to keep them close, which turned a fishing village into one of the busiest wildlife attractions in the country.
The debate
Researchers and conservation groups have long criticised the feeding. They say it can change the sharks’ natural behaviour and migration, give them a poorer diet, and expose them to injury from boat propellers and crowds. Supporters point out that the income has helped local families and that rules have been tightened.
We think you should decide for yourself, with the facts. If you go, follow the rules strictly. If you would rather see whale sharks in the wild without feeding, look at Donsol in Sorsogon or seasonal sightings elsewhere, where encounters are not guaranteed.
Getting there
Oslob is about 120 km south of Cebu City, three hours or more by bus or car. Because the activity runs early in the morning, many people stay overnight in Oslob. See our Cebu guide.
A perfect day
- Decide on the whale sharks with the facts above.
- Take a boat to Sumilon Island for its sandbar and protected reef.
- Swim at Tumalog Falls, a curtain of water over mossy rocks.
- Continue to Moalboal for the wild sardine run. See our Moalboal guide.
Through the seasons
- December to May: usually calmer seas.
- Typhoon season: boats are suspended in bad weather.
Respect the place
If you join the whale shark activity: keep at least the required distance, never touch or ride a shark, no flash photography, no sunscreen in the water, and listen to the briefing.
Photo gallery
Frequently asked questions
Is it ethical to see the whale sharks in Oslob?
Opinions are divided. The activity supports local fishing families, but researchers and conservation groups say feeding wild whale sharks goes against good wildlife-watching practice. Many travellers choose to skip it.
Where can I see whale sharks without feeding?
Donsol in Sorsogon has offered whale shark interaction tours without feeding, where sightings are not guaranteed. Southern Leyte and other areas also have seasonal sightings.
What is Sumilon Island?
A small island just off Oslob with a white sandbar and one of the country's oldest marine sanctuaries.
What time does whale shark watching start?
Early in the morning, so most visitors stay overnight in Oslob or leave Cebu City before dawn.
Romblon
A quiet island province of marble workshops, white sandbars and one of the country's toughest mountains.
We checked this guide against the 3 sources listed below. Last updated 14 November 2026. Basis: researched from official sources. Written and edited by Delfin, with AI-assisted research (how we work). Prices, hours and rules change, so confirm before you travel. Spotted something out of date? Tell us.
