First broadcast: on BBC HDLatest broadcast: on BBC Two Northern Ireland HD
Monty Halls explores Australia's natural wonder. The Great Barrier Reef is vitally linked to the rest of the planet and creatures travel thousands of miles to visit. Show more
First broadcast: on BBC HDLatest broadcast: on BBC Two Wales HD
As well as coral, the reef is made up of jungle, hundreds of islands, mangrove swamps, mysterious deep-water gardens, vast sand flats and meadows of sea grass. Show more
First broadcast: on BBC HDLatest broadcast: on BBC Two Wales
Monty Halls explores Australia's Great Barrier Reef, examining the vast, complex structure of the coral reef itself and the wildlife that lives on it. Show more
