The coral reef of Rarotonga helped scientists create a better climate history.
El Niño events can affect millions of people around the world, causing drought in Australia and floods in the Americas.
After repeated bleaching in 2016 and 2017 corals on the Great Barrier Reef are producing far fewer offspring.
Children play on a beach in Palau, in the western Pacific Ocean. The country was the first to place a sweeping ban on sunscreen to protect its reefs.
(AP Photo/Itsuo Inouye)
As the mid-winter break draws crowds to beaches, tourists may be wondering if their sunscreen is toxic to coral reefs.
Keep slip slop slapping this summer.
Despite bans around the world, there's no empirical evidence sunscreens cause coral bleaching.
Some tropical frogs may be developing resistance to a fungus that has devastated species like
Atelopus varius, the variable harlequin frog.
A look at new research published in 2018 on fossa, deepsea corals and tropical frogs developing resistance to a deadly fungus.
A healthy coral reef on Millennium Atoll, Southern Line Islands.
Field samples, satellite measurements and isotopic data have shed new light on corals' eating habits.
Researching the most resilient corals could help us find ways to better protect reefs in the future.
Building an artificial reef.
Coral reefs are in crisis around the world, and may disappear entirely. 3D printing is a new idea to help them – but it won't be a cure all.
acro_phuket / shutterstock
Scientists have used 'tree rings' in coral to identify centuries of stress.
Staghorn and tabular corals suffered mass die-offs, robbing many individual reefs of their characteristic shapes.
ARC Centre of Excellence for Coral Reef Studies/ Mia Hoogenboom
The 2016 bleaching event resulted in 30% mortality on the Great Barrier Reef, with many corals dying of the heat before they bleached and the loss of branching corals creating less complex reef structure.
Researchers studied reef sands at Heron Island, Hawaii, Bermuda and Tetiaroa. In this photo, white areas show the predominance of sand on reefs.
Southern Cross University
Ocean acidification poses an increasing threat to the sediments that form the framework of coral reefs - within around 30 years, these carbonate sands may no longer be able to form.
Coral reefs are some of the most diverse ecosystems in the world.
If researchers shared their data, we could take a big step towards saving the world's coral reefs.
Some reefs are strong sources of coral larvae.
A new study identifies dozens of individual reefs on the Great Barrier Reef that are especially important for coral larvae dispersal and which could help the entire ecosystem bounce back.
During mass spawning events coral young rise from their parents to ocean surface.
Australian Institute of Marine Science
Every year buoyant bundles rise from a spawning coral, giving the impression of an upside-down snowstorm.
How the Great Barrier Reef can be helped to help repair the damaged reef.
Corals on the Great Barrier Reef that are tolerant to warmer waters can be used to help repair other parts of the reef damaged by recent coral bleaching events.
Make yourself at home.
Scientists have just discovered an unusual symbiotic relationship between crabs and living corals.
The southern Great Barrier Reef escaped both of the recent mass bleaching events. But time is running out.
AAP Image/ARC Centre of Excellence for Coral Reef Studies, Tory Chase
Tropical coral reefs can be saved from climate change and other pressures, but the window of opportunity is closing. And reefs are guaranteed to be markedly different in the future.
Diana Kleine using a CoralWatch chart to measure coral health.
As the Great Barrier Reef suffers a second wave of mass bleaching, there is a way to get involved.
Hundreds of thousands of crown-of-thorns starfish have invaded North Queensland, devastating reefs.
New research has uncovered a whole new way to combat the devastating crown-of-thorns starfish, by decoding the pheromones that they use to communicate.
The Great Barrier Reef is bleaching again, in its first back-to-back mass bleaching event.
The Great Barrier Reef is bleaching again. Without greater action on climate change and water quality, its World Heritage status could be listed as "in danger".