Mountains, canyons, plains — these geological features are not only present on land, but also under the sea, where scientists have now charted them in incredible detail in the ocean surrounding Antarctica. The five-year project mapped 18.5 million square miles, and even revealed a new deepest point in the Southern Ocean, a depression lying 7,432 meters (24,383 feet) below sea level called the Factorian Deep. This study and others like it around the world are filling major scientific gaps in our understanding of what the ocean floor looks like, a key part of knowing how to foster ocean health. More mapping also enables us to make an even stronger science-backed case for marine protected areas. If you want to turn this positive progress into action, you can join us today as we call on world leaders to protect Antarctica and secure the largest act of ocean protection in history. We’re close to reaching our goal of 250,000 petition signatures!
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Campaign updates
Together, we’ve achieved real impact on important campaigns.

Fisheries & Transparency

New restoration projects in 2025

Ocean Pact push goes viral

Marine Protection in Europe

Campaign to end bottom trawling expands into Protect Our Catch coalition

Bottom Trawling

Campaign launched to save African Penguins from extinction

Only One helped design and stage an innovative exhibit to galvanize countries to renew their focus on Antarctic protection

Longlining successfully halted in the Maldives

Critical step forward for the Chumash Heritage National Marine Sanctuary

Highest signature count to date calling for an end to the Faroe Islands dolphin and whale hunts

Cuba ratifies the High Seas Treaty
The Descendents Project and Only One release video urging end to toxic project

Sweden announces plan to ban bottom trawling

Only One launches new campaign to stop bottom trawling in EU protected waters

Our partners deliver petition signatures to the White House

Palau becomes first nation to ratify the High Seas Treaty

Petition signatures delivered calling for toxic train derailment remediation

Historic agreement reached on day one of COP28

68 countries sign High Seas Treaty on opening day of UN General Assembly

Over $250 million committed to fast-track ocean-based climate solutions

World leaders ratify first-ever Global Biodiversity Framework Fund

Only One launches new 30×30 campaign in Ireland ahead of key political announcement






























