Last year, the BBC aired Planet Earth II, a sequel to the highly successful documentary series of the same name, narrated by the great Sir David Attenborough.

Despite being an educational programme, the series was a hugely gripping piece of television that once again proved the corporation can make incredible documentaries.

Hoping to once again recreate success, the BBC has announced Blue Planet II, a sequel to the 2001 series that explored the world’s oceans.

“I am truly thrilled to be joining this new exploration of the underwater worlds which cover most of our planet, yet are still its least known,” Attenborough said in a statement.

The BBC hope the new series will highlight recent scientific discoveries, such as a new species of crab with a hairy chest, nicknamed the "Hoff crab” after Baywatch’s David Hasselhoff.

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The series' executive producer, James Honeyborne, said: ”The oceans are the most exciting place to be right now, because new scientific discoveries have given us a new perspective of life beneath the waves.

"Blue Planet II is taking its cue from these breakthroughs, unveiling unbelievable new places, extraordinary new behaviours and remarkable new creatures.

“Showing a contemporary portrait of marine life, it will provide a timely reminder that this is a critical moment for the health of the world's oceans.”

Giant cuttlefish in Australia captured for Blue Planet II (BBC/Hugh Miller) (BBC)

Similar to how technology improved between Planet Earth series, filming innovations have helped the crew behind Blue Planet II capture exciting new footage that wouldn’t have previously been possible.

Developments include suction cameras, which can be attached to whales and sharks, “tow cams” that can ‘capture predatory fish and dolphins head-on’, and probe cameras capable of filming minute ocean life.

The show’s crew revealed they have caught numerous unusual examples of marine behaviour on camera, some of which for the first time.

Highlights include reef octopus using sophisticated hunting techniques, the giant trevally fish that catches birds while in flight, and a dive with a sperm whale and her calf.