Whale shark tourism is booming globally, but unregulated interactions cause stress, injury, and altered feeding behavior in the world's largest fish.
Whale shark tourism presents a genuine tension: it generates conservation funding and public engagement while simultaneously causing welfare harm to the animals it celebrates. Provisioning disrupts natural foraging behavior and creates dependency on artificial food sources, with potential nutritional consequences. High-density tourist encounters cause avoidance behavior, increased diving depth, and altered movement patterns. Contact with swimmers removes protective mucus coatings and can cause physical injury. Best-practice guidelines — minimum approach distances, no touching, no flash photography, limited boats per animal — significantly reduce welfare impact when enforced. The Philippines feeding sites at Oslob remain controversial due to high interaction intensity.