Man has explored land, the ocean's surface, and large parts of the solar system, but not much is known about the mysterious depths of the Pacific Ocean.

Encircled by the Ring of Fire, the Pacific Ocean is the epicentre of natural mayhem, where violence is part of life. Creatures here must choose to avoid conflict or face it.

The challenge of finding food drives all life in the Pacific. Meet a destructive army of mouths, a killer with a hundred mouths, and the biggest mouth in the ocean.

In the Pacific, the quest to breed has created a stunning array of strange behaviours, from the pairing of forest penguins to the secret meeting of great white sharks.