In the US Oceana advocates for policies that will restore and maintain ocean abundance and biodiversity. 'U.S.-managed waters are among the most extensive national waters in the world, and Oceana is dedicated to making sure those waters are healthy and productive for generations to come. Oceana’s campaigns utilize grassroots organizing, in-house scientific experts and litigators, strategic communications, and political engagement to stop overfishing, reduce bycatch, protect habitat, curb pollution and increase transparency.' There are offices in Alaska, California, New York, Oregon and Florida

Oceano Azul Foundation in Portugal works to contribute to the conservation and sustainable use of the ocean. They operate in close partnership with Oceanario de Lisboa

Oceanosanos is a campaign created by the OCC (Cetacean Conservation Organization) in Uruguay to inform citizens about the threat to marine biodiversity of the current fishing model and to create propositional actions. They work 'to strengthen sustainable fishing, create marine reserves and combat ocean problems'.

With offices in Ottawa, Winnipeg and Halifax, Oceans North supports marine conservation in partnership with Indigenous and coastal communities. Their science- and community-based conservation in the Arctic regions of Canada and Greenland has the goal to promote policies and programs that address the unprecedented environmental changes taking place in the North and ensure that its waters are protected within the framework of Inuit knowledge, rights and consultation.

Oceans 5 is an international marine funders collaborative focused on ending overfishing, establishing marine reserves and combating illegal fishing. Founded in 2011 by four philanthropic institutions, it now includes 15 Partners and Members, providing about $12 million annually in grants to organizations working in all five oceans. In the past nine years, Oceans 5 grantees have achieved remarkable successes, including establishing several of the world’s largest fully protected areas and securing significant new fisheries conservation policies in the United States, European Union and Japan.

Our Fish is working to end overfishing and restore a healthy ocean ecosystem. By collaborating with others, and deploying robust evidence, they are calling for an end to overfishing as a critical and significant action to address the biodiversity and climate crisis.

Our Seas Our Future is an ENGO group based in aotearoa, New Zealand. OSOF operates as a volunteer driven, non-profit initiative that focuses on coastal and marine conservation advocacy and community engagement projects in New Zealand. The main areas of operation are in Dunedin, Christchurch, Wellington, Hawke’s Bay, and Auckland,

PRCM is a grouping of forces and diversified initiatives in support of a common goal of coastal and marine conservation in the West African region. A joint initiative of IUCN, WWF, Wetlands International and International Foundation for the Banc d'Arguin (FIBA) in partnership with the sub-regional Fisheries Commission (SRFC), the programme operates in seven countries: Mauritania, Senegal, Gambia, Guinea Bissau, Guinea, Sierra Leone and Cape Verde.

The Perry Institute for Marine Science is a not-for-profit organization committed to protecting the oceans through research that both informs the public and encourages action, ultimately improving understanding and stewardship of the oceans, with a focus on coral reefs, fisheries, mangroves, Marine Protected Areas, coastal ecosystems, and climate change. The Institute has been conducting research in support of ocean conservation and stewardship throughout the Caribbean. Some of the core programs have centered around the effective use of Marine Protected Areas for marine conservation and fisheries management, the health of coral reefs and associated ecosystems, and the management of key Caribbean fishery species like the queen conch, Caribbean spiny lobster, and particularly the Nassau grouper.

Pesisir Lestari Foundation (Pesisir Lestari) is a marine conservation organization that promotes the empowerment of coastal communities in managing their marine and fishery resources. For the sake of increasing the welfare of coastal communities, and the realization of a healthy and sustainable sea for generations to come. Pesisir Lestari is the main partner of marine conservation organization Blue Ventures in Indonesia since 2019.

Planet Indonesia works to conserve at-risk ecosystems through village-led partnerships, thereby empowering rural communities who live in the world's most biologically diverse ecosystems. They aim to reduce inequalities in rural communities, while promoting conservation and sustainable resource management. The marine component addresses coastal and marine management, working with communities to create new fisheries management systems through temporary mangrove reserves and Locally Managed Marine Areas (LMMAs). They help restore coastal fisheries that are the lifeline of communities. Their model helps reduce deforestation in mangrove forests, and helps strengthen local food security.

Point Blue's (formerly PRBO) Oceans Division uses science to guide ocean ecosystem protection, conservation, and management. Their work is focused on both coastal areas and the oceans, including the impact of climate change, sustainable fisheries and improved ocean zoning strategies that protect wildlife and ecosystems by engaging decision makers and the public in support of healthy oceans. Active in California, Farallon Islands and Gulf of Farallones, Antarctica. Point Blue’s (formerly PRBO) 140 scientists work collaboratively to reduce the impacts of climate change, habitat loss and other environmental threats while promoting nature-based, climate-smart solutions for wildlife and people.