The New York Marine Rescue Center is a rescue and rehabilitation organization that promotes marine conservation. They work to preserve and protect the marine environment through conservation efforts including rescue, rehabilitation, education and research, and are the primary responders for sick or injured seals, sea turtles, dolphins, porpoises and small toothed whales, and maintain the only marine mammal and sea turtle rehabilitation center in New York State.

The Omcar Foundation was created in 2007 for the conservation of dugongs, seagrasses, and mangroves through scientific and traditional knowledge. Under the foundation’s auspices, the OMCAR Palk Bay Centre provides services to the local fishing communities in coastal environmental education and awareness, a dugong and marine mammal stranding response, seagrass and mangrove restoration projects, sustainable squid fishery, tree planting, amongst others. Participatory conservation and sustainable livelihoods are key to their mission.

Oceanites provides scientific data and recommendations for the conservation of Antarctica, utilizing penguins to help understand the impact of climate change. Since 1994, Oceanites has been analysing penguin and seabird population changes across the vast Antarctic Peninsula, where it’s warming faster than anywhere else on Earth except the Arctic. The organisation represents the world’s only non-profit, publicly supported Antarctic research programme.

Dedicated to the worldwide conservation of the polar bear and its habitat through research, stewardship, and education, PBI provides scientific resources and information on polar bears and their habitat to institutions and the general public worldwide. While Canada, serves as an important hub for PBI scientists and educators, the organization's work on behalf of polar bears spans the Arctic including Svalbard, Russia and Alaska.

Project Seahorse is a marine conservation organization committed to the conservation and sustainable use of coastal marine ecosystems in general, and seahorses in particular. It is an international and interdisciplinary organization comprised of biologists, development specialists, and other professionals committed to conserving and managing seahorses, their relatives and habitats, through research, education, empowering communities, establishing marine-protected areas, managing subsistence fisheries, restructuring international trade, redressing habitat loss. Their seahorse projects are located in: Australia, China, Malaysia, Philippines, Portugal, Senegal, South Africa, Thailand, USA and Vietnam. On their website one can access their citizen science tool called iSeahorse when one can report sightings of seahorses.

Raggy Charters offers guided tours, led by conservationist, wildlife educator and marine safari specialist Lloyd Edwards, to see whales, dolphins, seals, sharks, penguins, and other marine in Algoa Bay. In addition to the marine education element, using funds generated by the ecotours, they run a number of conservation and research projects through the Baywatch Marine Conservation Project. These include advocating on behalf of and protecting the penguin colonies on St Croix Island and sharks in Algoa Bay, reducing plastic pollution via beach cleanups and educating on the subject, and educating the locals youth in particular on the importance of marine life. Cetaceans are another focus, specifically humpback whales, with the Southern Hemisphere Humpback Whales Migration Routes of particular interest, working with the World Cetacean Alliance. Raggy Charters' Welcoming the Whales to Algoa Bay Festival is an annual event, in 2021 in its fourth year, with the whale festival concept expanding along the coastline of South Africa.

SANCOBB's primary objective is to reverse the decline of seabird populations through the rescue, rehabilitation and release of ill, injured, abandoned and oiled seabirds. From the website: 'In a normal year where no oil spills occur, SANCCOB treats up to 2 500 seabirds, of which approximately 1 500 are African penguins. The remainder include various cormorants species (including the endangered Bank cormorant and Cape cormorant); various species of terns; pelagic birds such as albatrosses, gannets and petrels; oystercatchers, gulls, pelicans and other coastal birds found in the region. On average, 24 different seabird species are rehabilitated every year.'

SPOT is a marine turtle conservation and research project located in Northern Cyprus. Although initially established in the 1980’s as an organisation for conserving sea turtles, today SPOT has increased its area of research and projects concerning marine life. These include: Sea Turtles, Monk Seals, Bycatch and fisheries, Elasmobranch Research and Conservation. The Marine Turtle Conservation Project (MTCP) continues as a collaboration between SPOT, University of Exeter’s Marine Turtle Research Group and the North Cyprus Department for Environmental Protection. Citizen science is an important contributor into the projects, including volunteering and internships.

Save the Manatees exists to promote public awareness and education, fund manatee research, rescue and rehabilitate injured manatees, and lobby for the protection of manatees and their habitat.

SEA LIFE Trust is a global marine conservation charity, working to protect the world's oceans and marine life through projects, campaigns, and their marine animal sanctuaries – the Cornish Seal Sanctuary and the Beluga Whale Sanctuary. They support practical local projects to protect marine and freshwater wildlife and their habitats, alongside working on conservation campaigns to effect long-lasting change on a global scale. At the same time, they champion the need for plastic-free oceans, sustainable fishing, effective Marine Protected Areas, and an end to an over-exploitation of marine wildlife around the world.

Sea Sense is a community based, Tanzanian NGO that is dedicated to the conservation and protection of endangered marine wildlife and their habitats in Tanzania. They work closely with coastal communities to conserve and protect endangered marine species including sea turtles, dugongs, whales, dolphins and whale sharks, and to support sustainable small-scale fisheries. Sea Sense started as the Tanzania Turtle & Dugong Programme in 2001. Within two years, over 230 nests had been protected and over 10,000 sea turtle hatchlings had safely reached the sea. Levels of nest poaching reduced dramatically from 80% to less than 2%.

The Seal Conservation Society aims at protecting and conserving pinnipeds (seals, sea lions, and walrus) in the UK and Ireland. Appears to be dormant at this stage (2021)