Wild dolphins face threats from human activity that cause individual suffering at significant scale. Understanding these threats enables both personal choices and policy advocacy.
Wild dolphin welfare is affected by human activities across a spectrum from lethal bycatch to the chronic stress of tourist boat harassment. Individual dolphins caught in fishing gear experience prolonged distress and often slow death — welfare impacts that are invisible to consumers purchasing the fish that drove the fishing effort. Boat-based harassment of wild dolphins at swim-with or feeding sites disrupts social structure, prevents rest, and creates chronic stress that has measurable effects on reproduction and survival. Spinner dolphins in Hawaii have been particularly studied, with tourism operations consistently preventing the daytime rest that these nocturnal foragers require. Regulatory protection of dolphin resting areas and bycatch mitigation technology address these problems, but awareness and consumer choices also drive change.