He's broken several world records: largest group skydive, longest scuba dive on a single tank—and the most species of nudibranchs ever found on a single dive (71).He's spent 23 years chasing these tiny creatures, building a global follow...

The UNESCO World Heritage Committee is concerned about the Great Barrier Reef - warning Australia to do more to protect it or risk an “In Danger” listing. So how serious is this threat, and are governments doing enough to respond?This we...

Critics said it would never work. But after 30 years of surveying reefs the hard way - diving with a slate and pencil - marine ecologist Brett Kettle knew there had to be a better way. So he built one.In this episode of Word on the Reef, Ta...

What has eyes on the tips of its 20 arms, venomous spines, is almost impossible to kill — and is munching the world’s largest reef?Meet the crown-of-thorns starfish.Professor Morgan Pratchett has spent years studying this formidable pre...

What has eyes on the tips of its 20 arms, venomous spines, is almost impossible to kill — and is munching the world’s largest reef?Meet the crown-of-thorns starfish.Professor Morgan Pratchett has spent years studying this formidable pre...