Coral City

Never-before-seen underwater footage of marine life, seascapes, and animal behaviours of the Great Barrier Reef.

As summer arrives, supersize sea snails try to fend off an invading gang of coral-hungry starfish and more

As winter descends, life on the bustling reef slows down. Reef sharks and octopuses meander, and there's a look at a coral oasis atop an old shipwreck.