The increasing use of the sea for human activities has resulted in a dramatic rise in noise levels.
New South Wales wants to extend its shark net program after a spate of attacks in the north of state.
Seagrass is more than just a bit of sea greenery.
Most ocean species start out as larvae drifting with currents. Using underwater robots, scientists have found that larvae use swimming motions to affect their course and reach suitable places to grow.
The oceans are filled with sounds produced by animals. However, a recent study shows that ocean sounds are diminishing due to nutrient pollution and ocean acidification.
More of Australia's oceans should be placed under high protection, according to the latest marine reserves review.
We tend to think of the oceans as quiet, when in fact they're anything but. Noise is the "forgotten pollutant", but the good news is that unlike many other pollutants it can be switched off if we try.
The Papahānaumokuākea Marine National Monument is huge win for preservation, but it also poses outsized management challenges for the National Park Service.
Marine parks need to cover large swathes of ocean, but they also need to cover the right areas if they are to deliver the best conservation. New research off Australia's northwest suggests how.
Scientists are using detailed computer models of the ocean to trace debris back through the currents to the potential crash site.
How flawed citation practices can perpetuate scientific ideas even before they've been fully established as true.
They give us part of the air we breathe but microscopic phytoplankton can also be toxic. They are also on the move thanks to climate change so a new Australian database hopes to monitor any changes.
A combination of factors – pollution, disease and overfishing – is harming corals but scientists have found clues to effective treatment by studying corals' microbiome.
Microplastics go largely unseen but are a scourge of the oceans. Filmmaker Jo Ruxton answers questions about the challenge of filming it.
What scientists first thought was an ancient species that had survived undiscovered for many millions of years, turns out to be part of something equally mysterious.
Climate change isn't the only thing making sea levels higher and cyclones more intense.
Researchers have long used such techniques to learn about currents and tides.
Infectious diseases are a normal part of ocean ecosystems, just as they are on land. But climate change is altering the oceans in ways that could make marine diseases spread farther and faster.
The open oceans are the world's "wild west", falling outside any nation's jurisdiction. UN negotiations are aiming to draft new laws for the high seas.
From time-shifting earthquakes to bizarre creatures, the crushing depths of the hadal zone are another world.