Wild Dolphin Sonar Injury from Naval Exercises

Military sonar and explosive testing cause acoustic trauma, behavioral disruption, and mass strandings in wild dolphins and other cetaceans worldwide.

Key Facts

Mid-frequency active sonar has been linked to dozens of mass stranding events involving beaked whales and dolphins since the 1990s.
Acoustic trauma from sonar can cause hemorrhages around the ears and brain, gas embolisms, and internal bleeding.
Dolphins rely on echolocation for navigation, hunting, and social communication — sonar disruption impairs all three.
Affected animals often strand alive but disoriented, and many die despite rescue attempts.
The US Navy has been required by federal courts to implement mitigation measures during training exercises in sensitive areas.
Noise from sonar can travel hundreds of kilometers underwater, affecting animals far from the source.

Welfare Considerations

The suffering caused by military sonar involves acute acoustic pain, disorientation, and in severe cases a slow death from internal injuries after stranding. Beaked whale species appear particularly vulnerable due to their deep-diving physiology. Even non-lethal sonar exposure disrupts foraging and social behavior, with documented cases of animals abandoning critical feeding areas for weeks after exercises. Welfare advocates argue that existing mitigation zones are insufficient and that real-time monitoring during exercises should be mandatory. The challenge lies in balancing defense requirements with the welfare of highly sentient marine mammals whose injury and death is preventable.

What You Can Do

Support organizations like Whale and Dolphin Conservation that advocate for stronger sonar mitigation regulations.
Contact elected representatives to urge support for the Marine Mammal Protection Act and Navy sonar reform.
Follow and share scientifically credible stranding reports to raise public awareness.
Support research institutions studying cetacean acoustics and developing better sonar alternatives.
Encourage transparency in military environmental impact assessments by supporting open government initiatives.