Sound is essential to life in the ocean. Whales, dolphins, and many other marine species rely on sound to communicate, navigate, find food, and avoid danger. But the ocean is becoming increasingly noisy. Shipping traffic, seismic surveys for oil and gas, military sonar, and offshore development all add powerful human-made sounds that travel far underwater. These noises can mask communication, disrupt migration and feeding, cause stress, and in some cases lead to injury or strandings. Natural sounds like weather and earthquakes are part of ocean life. Human noise is not. As ocean use continues to grow, protecting quiet spaces and reducing harmful noise is critical to safeguarding marine ecosystems and ensuring a healthy ocean for all. Graphic by @noaa