The worlds largest trees are dying off due to the encroachment of man.

Lessons from tens of millions of years ago are pointing to new ways to save and protect today’s coral reefs and their myriad of beautiful and many-hued fishes at a time of huge change in the Earth’s systems.

Australian scientists have urged greater consideration for the brilliantly-hued parrot fishes that tend and renew the world’s imperiled coral reefs.

Sharks are in big trouble on the Great Barrier Reef and worldwide, according to an Australian-based team who have developed a world-first way to measure rates of decline in shark populations.

An international team of scientists has achieved a major breakthrough in fishing sustainability on coral reefs which could play a vital role in preventing their collapse.