The nail-biting experience of attempting to get the perfect shark shot for the world's most famous nature series has been shared by a West Australian conservationist in the lead-up to its premiere Down Under.

It has been 16 years since Sir David Attenborough's Blue Planet; now the sequel Blue Planet II will screen in Australia, after being hailed as Britain's top-rating show in 2017.

Blue Planet II was in production four years, using breakthroughs in marine science and revolutionary technology to complete more than 6000 hours of underwater diving and filming.

It visited 39 countries and filmed across every continent and ocean, and two Australian locations feature: the Great Barrier Reef, and the tiger sharks and seagrass meadows of Shark Bay, WA.