AIDA is a pioneer organization working on environmental protection in some of the world’s most vulnerable communities and critically endangered habitats. Established in 1998, AIDA uses the law and science to protect sensitive ecosystems and communities suffering from environmental harm, primarily in Latin America. Marine projects they are involved in include campaigning to end subsidies which promote overfishing, protection of species which are important for coral reefs, protecting the ocean from threats such as mining and overdevelopment of shores. Active in: Argentina, Canada, Chile, Costa Rica, Ecuador, Mexico, Peru, USA.

ACF is Australia's national environment organization which advocates on issues which pose a threat to the natural world, including mining projects which threaten the reefs and marine life.

Azul is a grassroots organization with the aim of involving people of Latino background to ocean conservation, specifically with the aim to engage the community in protecting coastal resources and marine life. Amongst their successes is a ban on shark fins and also a ban on single use plastic bags in California.

Blue Climate Solutions 'seeks to inform governance and policies on climate change mitigation and adaptation, sustainable development, marine management and conservation', with a sole focus on blue carbon. This is an Ocean Foundation project, which formed the Blue Climate Coalition: over 100 conservation groups and environmental stakeholders, and over 150 scientists from 43 countries around the world. The Coalition has advanced policy options for blue carbon with the United States executive and legislative branches, US government agencies, and through the United Nations Framework Convention on Climate Change (UNFCCC) process.

With a network of grassroots individual citizen activists, the Blue Frontier Campaign works towards the improvement of ocean policies in the 23 coastal states of the United States. According to Blue Frontier Campaign, the mission of the initiative is to construct the solution-oriented citizen engagement required to save our ocean, coasts and the communities. The initiative conducts regional meetings, public education campaigns and publishes books to achieve their goal. The campaign was founded by award-winning author and journalist David Helvarg in 2003. Blue Frontier works to support seaweed (marine grassroots) efforts at the local, regional and national level, with an emphasis on bottom up organizing to bring the voice of citizen-activists into national decision-making that will impact our public seas.

The aim of Blue Marine Foundation (BLUE) is 'to combat over-fishing and the destruction of biodiversity – arguably the largest problem facing the world’s oceans – by delivering practical conservation solutions, including the creation of large-scale marine reserves.' This includes sustainable fisheries which will allow fish stocks to recover. Their reach includes the UK, St Helena, Maldives, Aeolian Islands, Ascension Islands, Caspian Sea, Namibia, Patagonia and Tristan da Cunha, amongst others, and includes seagrass revegetation, protection of kelp forests, aquaculture and the blue economy in a drive to protect marine life and the communities dependent on it.

Blue Seas Protection is a marine conservation charity with the multiple missions of addressing climate and environmental issues, political campaigning, education and awareness about marine conservation, and direct action, working at all levels, from global and national Government campaigns, to local "boots on the ground" community projects. Their main activities are aimed at: Combatting overfishing (via advocacy, the Seaspiracy petition, and working with local fisheries), combatting marine pollution (via their Operation Sea Sweep programme and beach cleanups), education and awareness (via their SharkLab programme and outreach), the protection of marine species (including their BSP Marine Mammal Medics for local incidents), and their Marine Crime Watch monitoring and reporting system.

Bluewater Network was leader in efforts to reduce environmental harm from vessels, vehicles, and craft. Merged with Friends of the Earth

Based in Monterey Bay, California, COA conducts marine research to drive conservation, with the additional aim to educate on marine and conservation issues. In one such project, COA marine biologists travel to Antarctica to conduct cutting-edge research on whale populations and behaviour. By combining research with conservation and education, they are contributing to the understanding and protection of marine mammals worldwide, and ensuring that their populations persevere and thrive into the future.

Center for Biological Biodiversity has a membership organization with approximately 1.1 million members and online activists, and is known for its work protecting endangered species through legal action, scientific petitions, creative media and grassroots activism. The Center is working to establish crucial protections for Pacific Ocean species and their habitats based on the following rationale: The 'high seas', or 'open ocean', have historically been a no-man's-land, claimed by no single country and not governed by any single body of law; and the sea has been treated as an inexhaustible resource, infinitely deep, wide, and bountiful. But the advent of large-scale commercial fishing, shipping and oil drilling has pushed many species to the brink of extinction and beyond, and the oceans, animals and natural systems are now in serious decline. While their main office is in Arizona, they have bases in many locations in the US, including in Hawaii.

CEMDA is a legal organization working in defence of the environment and natural resources in Mexico, including the marine regions. Within their broad scope, they include a coasts and seas focus which recently called for the protection of the Veracruz reef. They advocate for the development of national policies regarding coral reefs, such as an Official Mexican Standard on the management and restoration of reef ecosystems. Amongst their many proposals are: an inventory of marine resources, not only those of extractive or commercial importance; a project to establishes the specifications for the preservation, conservation, sustainable use and restoration of coastal wetlands in mangrove areas; geographically defined fishing concessions, under criteria of ecosystem management and social equity; recovery programs for overexploited resources and fisheries management for all species subject to exploitation; create the General Law of Seas and Coasts to change the management of coastal and marine ecosystems; and, finally, prepare the regulations for the General Law on Sustainable Fisheries and Aquaculture.

CSI is an all-volunteer, non-profit organization involved in the conservation, education and research of cetaceans (whales, dolphins and porpoises) and their marine environment. Originally the Connecticut Cetacean Society (1974), CCS became Cetacean Society International and is a global leader in cetacean advocacy, with contacts in over 20 countries today. In 2013, CSI became the first US Founding Partner of the World Cetacean Alliance. Their stated purpose includes the following: Oppose rogue whaling and any attempts to overturn the ban on commercial whaling; Promote whale watching as an economic alternative to whaling in developing nations; Represent cetaceans as an NGO at the IWC (International Whaling Commission) and CITES (Convention on International Trade in Endangered Species), and assists regional workshops and meetings, amongst many other initiatives all with the common aim of increasing awareness of the plight of whales, dolphins and porpoises, and to ensure their protection.