Ocean Noise Pollution and Marine Animal Welfare

Anthropogenic ocean noise from shipping, military sonar, and seismic surveys causes significant welfare harm to marine animals.

Key Facts

Ocean ambient noise has increased 10-100 fold since industrial shipping began
Cetaceans use sound for navigation, communication, and hunting — noise pollution directly impairs all three
Navy sonar exercises have been documented causing cetacean strandings from acoustic trauma
Seismic surveys for oil and gas produce sound levels that cause immediate injury to fish
Noise pollution causes chronic stress responses in cetaceans measurable through stress hormone levels in blow samples

Welfare Considerations

Ocean noise pollution creates welfare harm across multiple mechanisms: direct acoustic injury from extreme sound events (sonar, seismic), chronic stress from background shipping noise, and communication disruption that impairs social bonds and predator detection. Cetaceans with impaired echolocation and communication capacity face reduced foraging success and social disconnection. Noise-induced stress compounds other welfare burdens — pollution, climate change, fisheries interactions — faced by marine mammals. Shipping speed reduction, alternative sonar technologies, and seismic survey mitigation all reduce acoustic welfare burdens.

What You Can Do

Support International Whaling Commission efforts to address ocean noise pollution
Advocate for shipping noise reduction standards through MARPOL regulation
Support organisations lobbying against seismic survey licenses in critical cetacean habitat
Learn about ocean noise pollution impacts and share with marine conservation communities
Choose cruise lines and shipping companies with voluntary noise reduction commitments