I’d never heard of Sylvia Earle before this film. Now, she’s fast becoming my new hero.

Mission Blue tells Sylvia’s story, starting out as a young marine biologist in 1960s America.

She studied the ocean back when there were very few signs of human destruction. “No one at this time imagined we could do anything to harm it” she explains.

Just because you can’t see any changes to the surface of the sea, doesn’t mean it’s not happening underneath

In just 50 years, overfishing has killed off 90 per cent of the ocean’s top predators including sharks, bluefin tuna, swordfish, marlin, and king mackerel. Half the coral reefs in the world are dead.

Sylvia went on to dedicate her life to exploring the ocean – and now she’s determined to save them.

Watch this film and you’ll never look at the ocean in the same way again.

Watch Mission Blue on Netflix here