Ocean Noise Pollution and Marine Animal Welfare

Human-generated noise in the ocean — from shipping, sonar, seismic surveys and pile-driving — causes measurable harm to marine mammals, fish and invertebrates. Reducing ocean noise is an emerging marine welfare priority.

Key Facts

Blue whales communicate using low-frequency calls audible over thousands of kilometres; shipping noise occupies the same frequency range, effectively deafening whales to long-range communication
Navy sonar exercises have been linked to mass strandings of beaked whales, which show haemorrhaging consistent with acoustic trauma and panic-driven ascent from depth
Seismic surveys using airguns produce the loudest human-generated sounds in the ocean — effects on fish, marine mammals and invertebrates extend for hundreds of kilometres
Chronic shipping noise causes measurable changes in whale song, dolphin call patterns and fish vocalisation — all indicators of communication disruption and stress
Noise reduction technologies including propeller design improvements and speed reductions near whale habitats can significantly reduce shipping noise impact

Welfare Considerations

Ocean noise pollution is invisible to most humans but pervasive and damaging for marine animals that depend on acoustic communication, navigation and prey detection. For toothed whales using echolocation, and baleen whales using long-range song for mating and social contact, noise pollution is not merely unpleasant — it impairs fundamental life functions. The welfare case for ocean noise regulation is strong and growing. Consumer and regulatory pressure on shipping, offshore construction and naval operations to adopt noise mitigation measures is an important and neglected advocacy area.

What You Can Do

Support campaigns for speed reduction zones and quiet shipping corridors in key whale habitats
Advocate for seismic survey restrictions in areas of high marine mammal density
Choose seafood and products from companies with clear ocean noise mitigation commitments in their supply chains
Learn about ocean noise pollution from Ocean Conservation Trust and other marine welfare organisations
Engage with marine protected area campaigns that include noise pollution as a management consideration