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".
A typical reef scene within the Chagos Archipelago.
The British overseas territory faces an environmental crisis.
Bleached corals are still alive, but they are starving, and often die in the following weeks.
Months after record breaking coral bleaching, research teams are taking stock of the damage on the Great Barrier Reef.
Don’t write it off just yet.
Once upon a time dead coral was something to be celebrated on the Great Barrier Reef.
A booby family on a sandy cay in the Coral Sea.
The marine reserves review has recommended major changes to the Coral Sea, but not for the better.
Months after the bleaching event on the Great Barrier Reef, signs of the hoped-for recovery are scant.
Kirsten Tidswell/Climate Council
Member of the Climate Council this week returned to one of the areas of the Great Barrier Reef that was worst affected by this year's coral bleaching. What they found was far from encouraging.
We think of coral reefs as a diverse ecosystem, but each coral is an entire and complex microworld of organisms imperceptible to our eyes.
Just like humans, corals live with myriad microscopic organisms. We are just starting to understand this unseen world.
Microbes living on corals are instrumental in keeping coral reefs healthy.
A new study provides insight into coral-dwelling microbial communities and how they react to pollution, overfishing, and climate change. What does it mean for the Great Barrier Reef?
Malcolm Turnbull and his colleagues have pointed $1 billion of the government’s existing green energy funding towards the Great Barrier Reef.
The Coalition has ramped up the race to fund the Great Barrier Reef's protection. All three major parties have promised hundreds of millions of dollars, but where from, and what will they be spent on?
Recent aerial surveys found huge amounts of coral bleaching in the Great Barrier Reef.
Terry Hughes/ARC Centre of Excellence for Coral Reef Studies
Warm seas are causing coral 'bleaching' in one of the world's biodiversity hotspots.