Oslob, on the southern tip of Cebu Island, is one of the most reliable places in the world to see whale sharks year round, where these gentle 6 to 10 metre filter feeders gather in a coastal bay, making it a major highlight of Cebu City tourism and day trips from Cebu City. The activity began in the early 2010s when local fishermen started hand feeding them krill, creating a predictable viewing experience that draws visitors for one of the most unique things to do in Cebu City. The practice is controversial among marine biologists because it may alter natural migration patterns, and visitors should be aware of this trade off when planning their trip. Despite this, for many travellers the encounter remains the closest they will come to swimming with the largest fish in the ocean, making it a standout experience in Cebu City sightseeing.

