Clown fish in anemone
Photo:Gregory Piper/Ocean Image Bank

Reimagine: Beyond the world we know, a new relationship with our ocean

The ocean covers over 70% of the planet. It is our life source, supporting humanity’s sustenance and that of every other organism on earth.

The ocean produces at least 50% of the planet’s oxygen, it is home to most of earth’s biodiversity, and is the main source of protein for more than a billion people around the world. Not to mention, the ocean is key to our economy with an estimated 40 million people being employed by ocean-based industries by 2030.

Even though all its benefits, the ocean is now in need of support.

With 90% of big fish populations depleted, and 50% of coral reefs destroyed, we are taking more from the ocean than can be replenished. We need to work together to create a new balance with the ocean that no longer depletes its bounty but instead restores its vibrancy and brings it new life.

“Reimagine”, the theme of World Oceans Day 2026, invites us to change the way we see and care for the ocean. For too long, we have viewed it as something distant, when in fact it is part of our daily lives: the air we breathe, the food we eat, and the climate balance that makes our existence possible. Let's stop being mere beneficiaries of its resources and let's become true guardians of its future.

World Oceans Day 2024 poster

Visit the official UN World Oceans Day website!

Visit the official website to learn more about the International Day, find out about news and celebrations, or read the latest news and reports on the oceans.

Join us and celebrate the value of oceans

World Oceans Day reminds every one of the major role the oceans have in everyday life. They are the lungs of our Planet and a major source of food and medicine and a critical part of the biosphere.

The purpose of the Day is to inform the public of the impact of human actions on the ocean, develop a worldwide movement of citizens for the ocean, and mobilize and unite the world’s population on a project for the sustainable management of the world's oceans.

Hosted by the Division for Ocean Affairs and the Law of the Sea of the Office of Legal Affairs of the United Nations, in partnership with the non-profit organization Oceanic Global, this year's annual program will celebrate the wonders of the ocean as a source of life that supports humanity and all other organisms on Earth.

Did you know?

  • The ocean produces at least 50% of the planet’s oxygen.
  • The ocean is key to our economy with an estimated 40 million people being employed by ocean-based industries by 2030.
  • Oceans absorb about 30% of carbon dioxide produced by humans, buffering the impacts of global warming.

 

A diver exploring an underwater cave

Coming soon: What is the state of our oceans?

The third edition of the World Ocean Assessment, the UN leading global scientific report on the state of the oceans, will be launched soon. Prepared by more than 590 experts, the report provides key information to support decisions and actions for the protection and sustainable use of the marine environment. Access the draft summary ahead of the official launch.

Related links

 
Whale jumps out in the ocean

After nearly two decades of negotiations, a new UN agreement entered into force in 2026, marking one of the most significant recent advances in international maritime regulation. Its aim is to protect marine biodiversity in areas beyond national jurisdiction through new rules on marine resources, protected areas, and environmental impact assessments. It is one of many regulatory efforts led by the United Nations to safeguard our oceans.

A research vessel floats over the deep blue ocean with submerged equipment prepared for scientific exploration.

The UN Decade of Ocean Science for Sustainable Development (2021–2030) brings countries, scientists, and organizations together to improve ocean science and support a healthier, more sustainable ocean. A key event of the decade is the 2027 Ocean Decade Conference in Rio de Janeiro, Brazil, where global leaders and experts will meet to share progress in ocean science, build partnerships, and shape future ocean action.

an abstract illustration of people engaged in an event

International days and weeks are occasions to educate the public on issues of concern, to mobilize political will and resources to address global problems, and to celebrate and reinforce achievements of humanity. The existence of international days predates the establishment of the United Nations, but the UN has embraced them as a powerful advocacy tool. We also mark other UN observances.