The ocean connects us all — in every breath we take and every drop we drink. It gives us oxygen, food, medicine, and meaning. It regulates our climate and sustains all life on Earth.
But it's under serious threat from climate change, pollution, and habitat destruction.
This guide is here to help you make sense of the challenges — and show how even small actions can create big change.
Climate change results in warmer oceans, rising sea levels, and increased acidification. These changes impact marine species' distribution and threaten coastal communities around the world.
Photo: Lars von Ritter Zahony / Ocean Image Bank
Excessive fishing harms marine ecosystems and drains fish stocks. This puts food security at risk for billions who rely on seafood, especially in coastal areas.
Photo: Charlie Pinder / Charlie Pinder Creative
Each year, millions of tons of plastic pollute our oceans. This harms marine life, as they ingest plastic or get entangled in it. It also affects human health and economies that depend on clean oceans.
Photo: Naja Bertolt Jensen / Ocean Image Bank
More ships on the water create pollution, noise, and crashes with sea creatures. These issues upset ecosystems and worsen ocean health.
Photo: Michael Hall / Climate Visuals
Activities such as coastal development and bottom trawling damage crucial marine habitats. This destruction lowers biodiversity. It also weakens the ocean's ability to handle environmental changes.
Photo: Vivek Mehra / Ocean Image Bank
Higher CO₂ absorption reduces ocean pH. This makes it hard for marine life such as corals and shellfish to form shells. As a result, disruptions occur in food webs and economies.
Photo: Upamanyu Chakrabort / Ocean Image Bank / Mangrove Photography Awards
Rising sea temperatures make corals expel the algae they depend on. This causes coral bleaching and higher death rates. As a result, marine biodiversity suffers, and millions of people worldwide face threats to their livelihoods.
Photo: Daniel Nicholson / Ocean Image Bank
Poor ocean governance makes it hard to manage marine resources well. This results in overexploitation and harm to the environment.
Photo: Milos Bicanski / Climate Visuals
Rising sea levels and poor coastal management speed up erosion. This threatens habitats, infrastructure, and economies in both developed and developing areas.
Photo: Muhammad Amdad Hossain / Climate Visuals
IUU fishing hurts sustainable fisheries and endangers marine ecosystems. It also threatens the livelihoods of fishing communities, especially in the Global South.
Photo: Toby Matthews / Ocean Image Bank
Photo: Mick Haupt / Unsplash
Photo: Adam Sébire / Climate Visuals
Photo: John S Lewis / Climate Visuals
Photo: Rodney Dekker / Climate Visuals
Photo: Lars von Ritter Zahony / Ocean Image Bank
Photo: Daniel Nicholson / Ocean Image Bank
Photo: Colby Bignell / Climate Visuals
Photo: Naja Bertolt Jensen / Ocean Image Bank
Photo: Alex Mustard / Ocean Image Bank
Photo: Kristian Buus / Climate Visuals
Photo: Caro
Ocean actions in your own words
Photo: Renata Romeo / Ocean Image Bank
Ocean actions in your own words
Photo: Guy
Ocean actions in your own words
Photo: Srikanth Mannepuri / Ocean Image Bank / Mangrove Photography Awards
Ocean actions in your own words
Photo: Cat To
Ocean actions in your own words
But learning is the first step toward action. From making informed choices to speaking up, there are powerful ways we can all help the ocean.
Take action