Whales depend on their hearing to locate food, raise calves, and find mates.
But undersea noise pollution - from oil and gas exploration, ships, and other industrial sources - makes it difficult for whales to find each other. It can even damage their hearing.
Listen to ocean sounds
Large ship traffic, offshore oil exploration and development, and military exercises are all contributing to a barrage of noise buffeting ocean life. This cacophony is hard on whales that use sound for essential communication - especially in previously quiet oceans, such as the Arctic.
Try mixing industrial and whale sounds below, to hear the soundscape for yourself.
Sounds provided by the Scripps Whale Acoustics Laboratory, UCSD