Up to 236,000 tonnes of microplastic enter our oceans each year.
Light pollution is changing the day-night cycle of some fish, dramatically affecting their feeding behaviour.
Japan's fleet is on its way to the Southern Ocean for more "scientific" whaling. But a new resolution pointing out the importance of whale poo could help remove Japan's rationale for lethal research.
How you tell one whale shark from another? Spots and stripes.
Cool-water kelp forests are being eaten by tropical species moving south on warming waters.
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.
Australia has the third largest marine jurisdiction in the world, a vast ocean territory that contains important natural and biological resources. And it needs protecting.
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.
We've building in the sea for centuries, and it's putting our oceans out of balance.
More of Australia's oceans should be placed under high protection, according to the latest marine reserves review.
In coming decades many oil and gas platforms will have to be retired. Rather than being dismantled, they could be given a new lease of life as artificial reefs, helping industry and the environment.
Tiny organisms change ocean acidity to benefit themselves.
'Smell-free seas' would be a disaster for marine life.
Storms like those that lashed Australia's east coast flush pollution out to sea.
Cephalopods are able to adapt rapidly to changing conditions.
The next cancer breakthrough could be found in international waters – but who's in charge of the high seas?
The Great Barrier Reef might get all the attention, but what about our western coral reefs? Warmer waters and human impacts mean these reefs are in trouble.
It didn't turn out well for the whale who went to Westminster, but others have made a happy home in British waters.