As the Great Barrier Reef tumbles towards oblivion, filmmaker Karina Holden delivers an urgent, impassioned and achingly beautiful plea to save our oceans before it's too late.

Beneath the waves, where our eyes can't follow, a slow-motion apocalypse is taking place. From decaying reefs and overfishing to warming oceans and the sealife killed by our garbage, our oceans stand at the forefront of humanity's assault on the Earth. The stakes couldn't be higher, the barriers more impassable, but it's still not too late to make a change.

Acclaimed nature documentarian Karina Holden takes on her biggest, most vital topic yet in the devastating, rousing Blue. Exploring this ecological battleground through the eyes of seven scientists and activists operating at the coalface of marine preservation, from Indonesia to Hawaii to right here in Australia, Blue melds breathtaking cinematography and fearless polemic into an unforgettable, unignorable elegy for the beautiful, dying otherworld of the deep.