Commercial whale watching can benefit conservation awareness but causes welfare harm through boat disturbance, noise, and pursuit behaviors that interrupt feeding and social activity.
Frequent whale watching encounters cause measurable stress responses and behavioral changes in cetaceans. Animals that can no longer feed, rest, nurse, or communicate effectively due to boat disturbance suffer welfare harms that accumulate over a season. Responsible whale watching with strict approach distances, engine-off requirements, and limited daily encounters per individual can reduce these harms substantially.