Climate change has already made tropical oceans too hot for some marine species to survive. As they flee towards the poles, the implications for ecosystems and human livelihoods will be profound.
Climate change is strengthening the division between the ocean surface and the abyss.
Aquaculture is a growing source of healthy protein for millions of people around the world, but there are big differences between farming fish on land and at sea.
Around 75% of fishermen in the Outer Hebrides speak Gaelic. Their daily use of the language at work helps keep it alive.
Plus, new discoveries about early humans in Tanzania's Olduvai Gorge. Listen to episode 5 of The Conversation Weekly podcast.
As few as 100 companies produced 60% of revenues in eight ocean industries in 2018.
Each bit of plastic takes a unique journey once it reaches the ocean. We're trying to spot the patterns.
The countries of the ASEAN region have important roles to play in tackling the global problem of marine plastic waste.
As more and more plastic trash permeates the oceans, fragments are making their way into fish and shellfish – and potentially into humans.
Polluted oceans don't just harm wildlife, they are a source of ill health for humans too.
Marine protected areas will be important for achieving the ocean Sustainable Development Goals.
A high seas treaty could help rebuild populations – but time is running out.
There are more viruses in the ocean than stars in the Milky Way – and they're fundamental to Earth's biodiversity.
Despite their enormous value, mangroves are being removed at an alarming rate. A new tool aims to help communities reverse mangrove loss and tap into conservation programs and funding.
Microplastic pollution is a global issue, but where do they come from and how are they transported across the ocean? A new study finds polyester microfibres are common throughout the Arctic Ocean.
Whales are rediscovering their old haunts in the Arctic and Southern oceans after centuries of hunting.
Global leaders pledged to protect 10% of the oceans by 2020. We're nowhere close and the goal has proven particularly challenging to achieve in international waters.
Oceans 21 is a Conversation international series examining the history and future of the world's ocean.
The Southern (Antarctic) Ocean is our planet's primary storage of heat and carbon, and it's home to extraordinary life forms, from tiny algae and spineless creatures to penguins, seals and whales.
The Atlantic Ocean is still growing physically, but humans are over-harvesting its rich fisheries. The most famous one – North Atlantic cod – has become a textbook example of harmful overfishing.