Underwater tourism encounters with manta rays and sharks can disturb natural behavior, but well-regulated operations provide both conservation funding and minimal welfare impact.
Manta rays approached too closely or touched repeatedly during tourism encounters experience stress responses and may abandon important cleaning stations that are essential for parasite removal and social behavior. Feeding sharks for tourist encounters habituates them to human presence and food association, leading to increased bold behavior that can result in biting incidents and subsequent killing of the sharks. The cumulative impact of multiple daily dive groups at aggregation sites can displace animals from key habitats.