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.

AIMM is a Portuguese environmental non-governmental and not-for-profit organisation dedicated to the research and conservation of marine species and ecosystems such as dolphins, whales, sharks, sea turtles and marine birds. Founded in 2010 and based in the Algarve region, AIMM aims to be a reference for marine research and conservation, and education about the marine environment, promoting activities and establishing partnerships that, in a cooperative way, enhance the understanding of issues related to the marine environment. AIMM has developed most of its projects in the Algarve region, but also in other regions of Portugal and outside the country, particularly in the Atlantic. They work in collaboration with national and international entities, such as maritime agents, administrative authorities, dolphin watching companies, other NGOs and public institutions. In cooperation, they try to promote a sustainable and safer environment for marine species. See their instagram account at https://www.instagram.com/aimmportugal_org/. Their Youtube channel includes several videos well worth watching.

The Aeolian Islands Preservation Foundation exists to preserve the exceptional beauty and natural heritage of the archipelago which is north of Sicily in the Tyrrhenian Sea off Italy . AIPF raises money from people from all around the world who care about the future of the Aeolian Islands. which donations are used to give out grants to local environmental and sustainable initiatives. AIPF has worked with 'partners and funded projects to protect the land and sea, commissioned studies to engage the community and promote change, and established alliances to strengthen local voices on critical issues'. Such projects include combatting plastic pollution and marine debris, creating marine protected areas, monitoring marine life such as turtles, supporting marine research, education and awareness, amongst others.

The African Aquatic Conservation Fund is dedicated to the preservation of African manatees, turtles, cetaceans, and other aquatic wildlife and their habitats throughout the African continent. This is done via focused research, conservation, and education projects. The Fund works in close partnership with local people, scientists, governments, and other stakeholders for the benefit of both wildlife and humans.

Alaska Ocean Program is an environmental consultant (included here as the name suggests a public interest group but it is in fact a commercial enterprise)

The Alaska Wilderness League works to protect Alaska's most significant wild lands from oil and gas drilling and from other industrial threats. The members include fishermen, subsistence harvesters, marine scientists, business owners, conservationists, families, and others who care deeply about Alaska's oceans.

The Alexandria Turtle and Wildlife Rescue Team focuses on protecting wild animals in their natural habitats, in particular sea turtles

Alnitak has worked for the past 30 years to protect the biodiversity of the Mediterranean Sea through research, education and community engagement, involving volunteers in their research missions. This has included a successful turtle tagging project, OASIS, and MEDTOP, monitoring the top pelagic species in the Mediterranean. In 1989 Alnitak restored the historical fishing boat Toftevaag with the purpose of developing science and education programs, and have a second ship Va de Bon Coeur.

The Refuge is a 20.5-mile section of shoreline along Florida’s east central coast, and is home to the most important sea turtle nesting habitat in the United States. More loggerheads nest within the Carr Refuge than anywhere else in the Western Hemisphere, and it is also the most significant area for green turtle nesting in North America. The Refuge hosts a variety of birds, reptiles, fish, mammals and invertebrates including brown pelicans, sea turtles, gopher tortoises, snakes, manatees, and crabs that make their homes in the ocean as well as on several habitats including the beach and dunes, coastal strand and scrub, maritime hammock, and mangroves.

Archipelagos, Institute of Marine Conservation is a Greek non-profit, non-governmental organization founded in 1998. Archipelagos is committed to researching and defending the biodiversity of the Greek seas and islands, as well as of the NE Mediterranean region overall. The focus is on a combination of multi-disciplinary scientific research and efficient conservation work.

AMCC is an organization based in Iceland that works towards marine conservation. Through its solution-based and scientific approach, AMCC aims to lead by example and encourage, inform and educate the public on the necessary steps to take. They are included in the Nordic Coastal Cleanup network.

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.