Embark on a journey from the intense heat of the tropics to our planet's frozen poles to witness new underwater worlds and extraordinary, never-before-seen animal behaviours.
Take an epic journey into the depths of the unknown, a realm that feels almost like science fiction, where alien worlds, inhospitable habitats, bizarre creatures, and extraordinary new behaviours reveal themselves.
Coral reefs occupy less than one tenth of one percent of the ocean floor, yet they're home to a quarter of all known marine species. Explore these complex, infinitely varied structures to discover the hidden worlds within.
Dive into the world's greatest wilderness, far from shore and many kilometres deep. This vast marine desert may offer little to eat and nowhere to hide, but it's home to some of the biggest and most spectacular creatures on Earth.
Journey into our planet's green seas, where bountiful kelp and mangrove forests provide a home for hundreds of species of sharks, armies of spider crabs, and the greatest gathering of cuttlefish in the world.
On the coasts, where disparate worlds collide, meet predatory starfish, puffins that travel 60 miles for a single meal, fish that live on land, eels that launch themselves from rock pools, and deft crabs that defy death with their acrobatics.
David Attenborough
Narrator
