Whale watching is a billion-dollar industry that can support conservation when well-managed, but unregulated or poorly conducted operations cause significant cetacean welfare impacts.
Cetaceans are highly sensitive to acoustic disturbance and social disruption. Repeated boat approaches alter feeding, resting, and mating behaviors. Female dolphins with calves show the greatest disturbance response. Propeller strikes injure or kill whales and dolphins approached too closely. In heavily touristed areas, cetaceans may avoid preferred habitat due to persistent boat presence. Good whale watching guidelines specify minimum approach distances, maximum boat numbers, slow approaches from the side rather than head-on, time limits near animals, and engine cut-off zones. Acoustic pollution from multiple vessels is cumulative. Swim-with-wild-dolphin programs generate more intense disturbance than boat-based watching. Certification schemes for responsible whale watching operators provide guidance and consumer choice tools.