The big-beaked, rock-munching fish that protect coral reefs

As the sun rises over a quiet coral reef, one animal breaks the morning silence. Named for its vibrant scales and beak-like teeth, the parrotfish devours a particularly crunchy breakfast: rocks. Why would any creature take bites out of the seafloor? Mike Gil explores how these quirky and flashy foragers play a key role in defending the essential coral reef ecosystem. [Directed by Franz Palomares, narrated by Addison Anderson, music by Carlos Palomares].