Dolphin Watch Alliance is a non-profit organisation that aims to bring ethical and financial support for projects serving the worldwide research and protection of wild dolphins. They currently support two projects in Hurghada, Egypt: “Dolphin Watch Natural Underwater Science” and “Care for Dolphins". By conducting both over-and underwater research, the project "Dolphin Watch Research Project" is trying to gain new insights into the behaviour of dolphins as to be able to set up necessary protection zones at certain locations in the Red Sea.

A.G. Sano is the founder of Dolphins love Freedom, a group in the Philippines that is advocating ocean conservation, especially the protection of dolphins. ‘What makes the group so successful is the medium they choose to deliver their message. A.G. is an artist and has the ability to create fantastic murals featuring all manor of aquatic life. Of course centremost to his murals is dolphins.’

DomSeTCO os Dominica's Sea Turtle Conservation Organization, protecting sea turtles and their habitat through research, education, and conservation programs. They are a member of WIDECAST.

The Memorandum of Understanding on the Conservation and Management of Dugongs and their Habitats throughout their Range (Dugong MOU) aims to promote internationally coordinated actions to ensure the long-term survival of dugongs and their seagrass habitats throughout their extensive range. The MOU entered into effect on 31 October 2007 in Abu Dhabi, United Arab Emirates, and has been signed by 26 countries. The Dugong Secretariat developed the Dugong and Seagrass Conservation Project.

The Dugong and Seagrass Conservation Project aims to enhance the conservation of dugongs (Dugong dugon) and their associated seagrass ecosystems in eight countries in the Indo-Pacific region : Indonesia, Madagascar, Malaysia, Mozambique, Solomon Islands, Sri Lanka, Timor-Leste and Vanuatu. A priority of the project is to work with local communities to help them understand the benefits of conserving dugongs and their habitat. They focus on sustainable fisheries practices and financial incentives, establishing Locally Managed Marine Protected Areas, and advocating for dugong and seagrass conservation as priorities in national and regional policies and planning. This is a GEF funded project, lasting from 2015-2018.

The Dugong & Seagrass Hub is an online platform designed to share collective tools, experiences and lessons learned whilst working to conserve seagrass ecosystems in dugong range states. This is run out of the UNEP Environment Agency, Convention on Migratory Species Office in Abu Dhabi.

DCNA's aim is to protect the natural environment and to promote sustainable management of natural resources on the six Dutch Caribbean islands. The organization was created to help consolidate knowledge and help bridge funding gaps for conservation within the Dutch Caribbean.

The Dyer Island Conservation Trust works to conserve and research the fragile and critically important marine eco-system at the southern-most tip of Africa. They strive to protect the largest surviving colonies of the endangered African Penguin whose numbers are at an all-time low; the globally important breeding and calving grounds of the Southern Right Whale; and, the world's densest populations of the vulnerable Great White Shark.

ECO is a network of fifty-plus large and small environmental organisations in New Zealand, as well as several hundred individuals. 'The core of ECO’s work is promoting and strengthening community environmental action, and working collaboratively towards better government policies and management decisions. ECO also works on global issues such as climate change, Antarctica, and oceans.' Amongst their focus areas related to marine issues, are: protection of the Ross Sea and Southern Ocean in Antarctica, expansion of aquaculture, sustainable fisheries, protection of coastal areas, oceans policies and marine protection.

With a mission to inspire learning and conservation ethics through outreach programs, hands on participation and research, ECOMAR is a conservation organization in Belize with multiple engagements in conservation, including their St. George's Caye Research Station & Field School with supports archaeological and marine research. They also have a Turtle Watch Program which studies sea turtle populations, and are engaged in the Belize Coral Reef Watch Program (part of the Meso-American Coral Reef Watch Program and is an “Early Warning Alert System” for coral bleaching. There is also the Lionfish Project where ECOMAR, the Belize Fisheries Department and other partners work with stakeholders in Belize to manage the invasive lionfish.

EarthEcho International is a nonprofit 501c3 organization founded in 2005 by siblings Philippe and Alexandra Cousteau in honor of their father Philippe Cousteau Sr., son of the legendary explorer Jacques-Yves Cousteau. EarthEcho International envisions a world where every individual, from all backgrounds and experiences, has the opportunity and tools to create a healthy and thriving environment. To that end, their mission is to build a global youth movement to protect and restore our ocean planet. EarthEcho collaborates with youth around the world to provide knowledge and develop tools that drive meaningful environmental action to protect and restore our ocean planet. Reaching more than 2 million people in 146 countries, they support the next generation to become environmental leaders who will transform the future.

Earth Island Institute is known for its activism on environmental issues. Founded in 1982 by environmentalist David Brower, it is a non-profit environmental organization and fiscal sponsor to more than seventy-five projects working in the areas of conservation, including amongst many others, projects related to the oceans. Not without controversy, they have targeted fishing methods and plastic pollution of the oceans, amongst many other issues.