Marine biologist, fish ecologist and self-confessed ocean optimist Steve Simpson explains the intricate sounds that exist in our oceans -- and why listening to this soundtrack can help us protect it. This talk was filmed at TEDxExeter. All TEDx events are organized independently by volunteers in the spirit of TED's mission of ideas worth spreading. With TED's podcast TEDx SHORTS, start each day with short, eye-opening ideas from some of the world's greatest TEDx speakers. Listen or subscribe wherever you get your podcasts.