Sonar

Three Killer whales (Orca) swim along side researchers.

Listening for Clues About Sonar’s Effects on Marine Mammals

Researchers study the behavior of killer whales and how they react to sonar. Credit: C. Kyburg; Obtained under NMFS permit #14534 Many animals depend on their eyes to navigate, find food, locate mates, and...

New Findings on the Effects of Noise on Whale and Dolphin Behavior

Marine mammals around the world face many challenges due to interactions with people, from overfishing and entanglement to vessel strikes and disturbance from human sounds. Dr. Brandon Southall discusses recent findings from SOCAL‐10, a...
Phoenix rises out of the waters east of Cape Cod, MA, in April 2003.

Scientists Use Bioacoustics to Protect Marine Mammals

Marine mammals such as whales, dolphins, and seals have an amazing ability to hold their breaths—sometimes for up to two hours—while they dive deep to search for food and evade predators. In the cold,...