Blue Planet II

From warm, tropical waters to frigid seas at the poles, oceans across the planet are explored to better understand the world beneath the waves.

Antarctica is the coldest, harshest and most remote continent on Earth, yet an unimaginable abundance of life can be found in the pitch-black darkness of the seabed.

Crazy, colorful, vibrant. The reefs are like a mad metropolis, and survival in these undersea cities is a challenge with many different solutions.

The open ocean is like a vast marine desert. To survive here animals go to the extreme with epic feats of endurance and intelligence.

The planet's green seas are an enchanted world, home to magical sea creatures. From towering forests to great plains of seagrass, animals fight for space and food in a seasonal world of boom and bust.

Coasts are the most changeable of the ocean worlds, but they offer great riches. To survive on this frontline between two very different worlds requires endurance and ingenuity.

The ocean is changing fast, but is it too late to save it? Dedicated scientists from around the world share their latest discoveries and reveal what the future holds for our oceans.