Spot the opera house.
The dust storm that turned Sydney red in 2009 triggered plankton blooms in the Tasman Sea, demonstrating how we might fertilise the ocean to take up more carbon dioxide.
Gamba Grass is altering fire regimes in the Top End, threatening human life and property, natural assets including Kakadu and Litchfield National Parks, and compromising savanna burning programs.
One of the Australian government's new research priorities is "environmental change". But can be hard to know how to tackle such huge and interlinked issues as climate change and species extinctions.
The reefs of Indonesia - part of the Coral Triangle - could lose many of their species thanks to climate change.
How will climate change affect life in the oceans? New research shows that the answer is likely good and bad.
Too many fish in our seas, like this Pacific bluefin tuna, are being lost to over-fishing – but better management can help.
Over-fishing is a massive environmental and economic challenge. Fortunately, there are new solutions being trialled – including in a tuna hotspot in the Pacific.
Expect to see more ships on the horizon, as global shipping booms. But how well are we measuring and governing what happens at sea?
As the world's land-based economies struggle with around 2% GDP growth, the global marine economy – often talked about as "the blue economy" – is a bright light on the horizon.
The Great Southern Reef is unique, beautiful and contributes significantly to Australia’s culture and economy. However, few of us realise the magnitude and value of this gem right at our doorstep.
T. Wernberg 2002
The Great Southern Reef covers 71,000 square km and contributes more than A$10 billion to Australia's economy each year.
Where there are groups of seals, there are sharks.
Massachusetts Office of Energy and Environment
A rash of white shark attacks this summer points to a rebounding population in the US – a sign of healthier oceans and the need to coexist with this apex predator.
The Southern Ocean is remote, cloudy – and full of plankton.
These tiny organisms play a big role in regulating the Earth's climate.
The moment a shark encounters Australian champion surfer Mick Fanning.
AAP Image/World Surf League, Kirstin Scholtz
Although frightening, the footage of Mick Fanning at Jeffreys Bay is a reminder that sharks are present in the oceans, and that the vast majority of interactions between people and sharks end without fatality or injury.
Sensationalized shark attacks skew the facts.
'Shark' via www.shutterstock.com
Millions tune in to Shark Week each year, but many walk away with the wrong impressions.
Acehnese fishers are among the quarter of the world’s population who live on the coast, and for whom climate-driven changes to the oceans would make life much harder.
Hotli Simanjuntak/EPA/AAP Image
Failing to stick to the world's agreed global warming limit of 2C won't just affect the atmosphere - it will play havoc with the oceans too, potentially ruining ecosystems on which much of humanity depends.
Whale sharks were one of the warm water species to move south during the 2010-2011 marine heatwave.
While eastern Australia trembles in the face of an El Niño, Western Australia's oceans could finally see relief from devastating marine heatwaves.
Out of sight out of mind? The vast majority of global warming is going into the ocean.
Over the past decade, warming air temperatures at Earth's surface appear to have slowed. But that ignores the vast majority of heat going steadily into the ocean. And, a new paper shows, that makes no difference to the long-term prognosis.
Marine parks are valuable tools to help safeguard species such as seagrasses.
AAP Image/James Cook University
Australia's network of marine parks - a decade in the making and announced in 2012 - haven't been implemented yet, and the Abbott government has already placed the plans under review. Why the hurry?
wave via www.shutterstock.com
Research project combines digital technologies with farms of wave generators to bring plentiful and reliable ocean power closer to commercialization.
Despite the high concentration of sharks in Cocos, some species have declined in number – a signal on the effectiveness of marine preserves.
Genna Marie Robustelli
Divers at the famed Cocos site off Costa Rica record declines in a number of shark species – a sign that marine preserves are limited protection against illegal fishing.
Plastic waste washed up on a beach in Haiti.
You might have heard the oceans are full of plastic, but how full exactly? Around 8 million metric tonnes go into the oceans each year, according to the first rigorous global estimate published in Science…
Kelp covered landscape in Western Australia.
Western Australia’s marine environment is unique. Two world heritage areas, the largest fringing coral reef in Australia, and more than a thousand kilometres of underwater forests, supporting incredible…
Turtles are among the species that could be harmed by dredging, even under the government’s new dredge dumping rules.
AAP Image/University of QLD
The Australian government’s latest report on the Great Barrier Reef, submitted to the UNESCO World Heritage Centre last Friday, has been carefully crafted and word-smithed, with many of its claims supported…
Researchers deploy robotic Argo floats into the ocean to measure temperature.
The oceans are continuing to warm steadily despite an apparent slowdown in global warming at the earth’s surface, according…