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.

AFMESI's mission is to achieve total sensitization of people, organizations, groups, governments among others in Africa towards achieving sustainable utilization of the marine environment and its resources, by providing a platform for information exchange among experts on the subject globally and harnessing and directing such knowledge to protecting, restoring and improving the quality of the oceans in the continent . (Note: social media contacts not connecting in July 2021)

AMMCO’s mission is to contribute to the protection of the aquatic megafauna and their habitats in Central Africa by improving the scientific knowledge of the area, and involving fishers and other stakeholders into sustainable fisheries and responsible watershed-use. The four strategies they have adopted include applied research and monitoring, integrated management, awareness and capacity building. In practice this involves conservation of the aquatic megafauna b: Protection, Restoration, Good local governance, Community-based conservation, Alternative livelihood and Advocacy. They aim to develop the advanced skills and experience required in aquatic research, achieved by providing internship, mentorship, and workshops to students and fishermen frequently.

Alaska Marine Conservation Council is a community-based, non-profit organization committed to protecting the long-term health of Alaska's marine ecosystems and sustaining the working waterfronts of the state's coastal communities.

Not precisely a marine conservation organization, but with the potential to impact on marine conservation significantly, Algaqua is a spin-off project at Malaga University, and in 2020, received the award for best business initiative in the Blue-Growth contest of the Andalusian Marine Maritime Cluster. The project is based on the sustainable production of different aquatic organisms, such as fish and algae, and various plants, mainly in food and other possible applications such as cosmetics or pharmaceuticals. The waste from one is used by other, for example, the nutrient rich water from fish farming is used for in vegetable farming. This system can be used for both freshwater and saltwater, growing both vegetables and algae.

The ASOC Southern Ocean Fisheries Campaign works on five continents to stop the Illegal, Unregulated and Unreported (IUU) fishing that is dramatically depleting toothfish stocks, the most important commercial fish in the Southern Ocean. At the same time, the long-liners are killing thousands of endangered albatrosses and other seabirds each year.

Ark2030 is on a mission 'to restore the 500 million hectares of ecosystems destroyed by mankind since the beginning of the industrial revolution'. A strategic and collaborative approach, working with specialist partners around the world, Ark2030 has developed funding models for environmental restoration programmes. They invest in the companies that are working to restore the natural world. Included in their sights are: Cleaning up the Ganges, restoring the global whale population, targeting plastic pollution in the oceans and on land, improving island eco-systems, developing mangrove plantations, protecting and restoring the Great Barrier Reef and other coral restoration programmes such as Coralive's Maldives project.

MarBrasil focuses on the conservation and preservation of the marine environment and the sustainable development of the Brazilian coastal area. They run several projects and programmes including in conservation of endangered species, research for the creation and management of marine and coastal Conservation Units, conservation of marine biodiversity and fisheries resources, education for marine and coastal conservation, and research and technological Innovation for conservation. For example, destructive fishing practices since the 70s have depleted fish stocks in Parana, causing difficulties to communities dependent on the ocean. One of their programmes – The Marine Biodiversity Recovery Program (REBIMAR) - works on the recovery and conservation of marine environments, as well as the preservation of endangered marine species, in addition to environmental education actions for the community.

APECE was founded with the aim of promoting the conservation and the study of sharks and rays (elasmobranchs) in Portugal. Their activities include: Lobbying for sustainable fisheries policies; Support for research and scientific projects that promote understanding of the effects that pollution has on sharks and rays; Implementing programmes and activities that promote public education and awareness of sharks and rays and conservation efforts on behalf of marine life.

Australian Marine Conservation Society is a non-profit organization whose mission is to protect the health and vitality of Australia's coasts and seas. AMCS provides leadership on a wide range of marine issues throughout Australia including marine parks, fisheries, threatened species and land-based pollution.

Billfish Foundation works worldwide to advance the conservation of Billfish & associated species to improve the health of oceans & economies.

The mission of this initiative is to restore oyster reefs to New York Harbor through public education. More specifically, Billion Oyster Project aims to replant 1 billion oysters in the harbour by 2035, with the participation of a million New Yorkers. And they are well on their way. So far they have planted 28 million oysters, with the participation of 6,000-plus local students and 9,000-plus volunteers. Their grant will support a citywide symposium for local students to present their research on ecosystems, marine life and water quality in New York Harbor, and on opportunities to make restoration more effective and engage their communities more deeply.