The trailer, titled The Prequel, features David Attenborough's narration over spectacular scenes of the Earth's oceans and the underwater inhabitants.

The five minute clip teases what is in store for the long-awaited sequel to the 2001 nature series; from slow-motion shots of blue whales soaring out of the ocean, to a glimpse of a bale of turtles occupying an entire beach as they slowly make their way to the sea, to close-ups of the extraordinary creatures on the sea floor.

The track played in the trailer is a collaboration from Hans Zimmer and Radiohead called '(Ocean) Bloom' developed exclusively for the nature series. 

Talking about Blue Planet II, Sir David Attenborough said he was "truly thrilled to be joining this new exploration of the underwater worlds which cover most of our planet, yet are still its least known.”

The six-part nature documentary series is set to be broadcast on BBC One later this year.