The researchers found nearly 38 million pieces of plastic rubbish on Henderson Island, in one of the remotest parts of the ocean.
Plastics pose a major threat to seabirds and other animals, and most don't ever break down - they just break up. Every piece of petrochemical-derived plastic ever made still exists on the planet.
Some sea animals with smooth shells can dig themselves into the sand in just a few seconds.
Maëlle, 7, wants to know why some shells are smooth, while others are corrugated. It turns out that while corrugated shells are strong, smooth shells can move fast.
By 2030, the Blue Economy will be worth $3 trillion. And the UK is well placed to capture a slice of this lucrative market, if it meets the challenges involved with innovation and ambition.
Fish leave bits of DNA behind that researchers can collect.
Mark Stoeckle/Diane Rome Peebles images
Animals shed bits of DNA as they go about their lives. A new study of the Hudson River estuary tracked spring migration of ocean fish by collecting water samples and seeing whose DNA was present when.
Microplastics are a major ecological concern causing damage to marine life.
Microfibres and microplastics are a massive problem for marine life. Once ingested, they
severely affect marine animals ability to eat. There's also concerns about their toxicity.
A blue whale surfaces.
Songs of marine animals can help us discover new populations.
Scientists have sequenced the seahorse's genome and found the genes that could explain male pregnancy.
Microplastics can carry other pollutants.
Oregon State University/Flickr
Up to 236,000 tonnes of microplastic enter our oceans each year.
Alfred the aetiocetid had teeth but needed a better way to capture his tiny prey.
The largest animals on the planet - the baleen whales - prey on some of the smallest. But how did their teeth evolve into the filters they use today?
Ship strikes can be deadly, as shown by this blue whale off the US northwest.
Craig Hayslip/Oregon State Univ./Flickr/Wikimedia Commons
Ships in Australian waters are getting bigger and more numerous all the time. We need a plan to help them avoid crashing into whales and other large sea creatures.
Right whales have been shown to be affected by noise pollution.
FWC Fish and Wildlife Research Institute/Flickr
The increasing use of the sea for human activities has resulted in a dramatic rise in noise levels.
Australia’s oceans are home to extraordinary marine life.
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 second-noisiest animal in the ocean, the snapping shrimp.
Dr Tullio Rossi
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.
A bloom of phytoplankton in the Barents Sea: the milky blue colour strongly suggests it contains coccolithopores.
Wikimedia/NASA Earth Observatory
Tiny organisms change ocean acidity to benefit themselves.
Coal dust can harm marine environments.
AAP Image/Dan Peled
Coal dust and oil can spread toxic chemicals hundreds of kilometres out to sea. But Australia's monitoring guidelines do not meet the standards used in countries such as the United States.
Stormwater may be a road hazard, but it can also harm marine life when it flows out to sea.
AAP Image/Paul Miller
Storms like those that lashed Australia's east coast flush pollution out to sea.
Corals north of Cairns have been hit hardest by the recent bleaching.
AAP Image/ARC Centre of Excellence for Coral Reef Studies, James Kerry
An estimated one-third of corals have now died in the parts of the Great Barrier Reef hit hardest by bleaching, meaning recovery could take years or even decades.
A study has shown that turtle hatchlings lend each other a flipper digging out of the sand to save energy.
Banco de Imagem Projeto Tamar/Flickr
New research suggests turtle hatchlings work together with clutch mates to escape their underground nests.
Coral affected by black band disease, Bahamas.
James St. John/Flickr
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.
Plastic fragments found in dissected fish.
Algalita Marine Research and Education
Dave West from the environmental group Boomerang Alliance told Fairfax that if you've got an average seafood diet in Australia, you're probably ingesting about 11,000 plastic pieces a year. Is that right?