Dolphins, porpoises, seals, and whales in heavily industrialised coastal waters face chronic welfare harms from chemical pollution, noise, and entanglement.
Marine mammal welfare in industrial coastal environments represents a chronic, multi-stressor burden that is difficult for these long-lived, intelligent animals to escape. Pollutants suppress immunity, impair reproduction, and cause neurological damage over decades. Noise disrupts communication, navigation, and foraging — equivalent to living in an industrial zone with no escape. Entanglement causes distressing and painful deaths. These impacts occur across entire populations rather than to individual animals, making their aggregate welfare scale enormous. Pollution controls, vessel speed limits, shipping lane adjustments, and fishing gear modifications all reduce these harms.