Marevivo is a significant Italian environmental association that protects the sea and its resources, focusing in particular on biodiversity conservation, sustainable development, enhancement and promotion of marine protected areas, combatting pollution and illegal fishing. They promote education in schools and universities, and act as an advocate influencing law and policy with many successful campaigns in Italy, such as recently the ban of microplastics in rinse-off cosmetics and the ban on sea cucumber fishing. Marevivo relies on the work of hundreds of volunteers and thousands of members scattered all over Italy, with representation throughout the country in the form of delegations in more than 25 centres. They are organised into diving, sailing, canoe & kayak, beaches and shore divisions.

Marine Conservation Costa Rica is dedicated to ocean conservation through action and education. Their projects include Coral Restoration, Reef Health Surveying and Marine Education. They offer two day marine conservation courses through to month long internships where the participants learn and have hands on experience in all aspects of running a coral restoration project.

Marine Conservation Institute is a non-profit scientific and conservation advocacy organization that has been working since 1996 to promote cooperation essential to protecting and restoring the Earth's biological diversity. From the headquarters in Seattle WA and the Washington DC and California offices, they work to protect marine life around the United States and beyond by encouraging research and training in marine conservation biology, bringing scientists together to examine crucial marine conservation issues, conducting policy research to frame the marine conservation agenda, leading outreach efforts to educate scientists, the public and decision makers on key issues, and building partnerships to solve problems affecting marine life and people.

The mission of the Marine Conservation Network is ‘to build a global size ocean community by closing the communication gap between scientists, conservationists, and the general public.’ This includes better communication and understanding among scientists, conservationists, and the public by establishing a shared platform for collaboration in pursuit of conservation and scientific advancement. This is aimed at addressing, together, the challenges facing the oceans today, including climate change, overfishing, plastic pollution, and habitat destruction. Their goal is to raise awareness, promote sustainable fishing practices, protect critical habitats, and ensure the health and resiliency of marine ecosystems. This includes sharing information and resources, including video resources, as well as advocating for policies and actions.

The mission of the Marine Conservation Network is ‘to build a global size ocean community by closing the communication gap between scientists, conservationists, and the general public.’ This includes better communication and understanding among scientists, conservationists, and the public by establishing a shared platform for collaboration in pursuit of conservation and scientific advancement. This is aimed at addressing, together, the challenges facing the oceans today, including climate change, overfishing, plastic pollution, and habitat destruction. Their goal is to raise awareness, promote sustainable fishing practices, protect critical habitats, and ensure the health and resiliency of marine ecosystems. This includes sharing information and resources, including video resources, as well as advocating for policies and actions.

MCP is dedicated to preserving and protecting coastal resources in the Philippines through education, volunteerism and research. They work to preserve fragile marine habitats like coral reefs and mangrove forests, with an additional aim of improving the quality of life for marginalised fisherfolk in the central Philippines. A volunteer based organisation, international volunteers can join a large professional team of marine biologists, scientists, teachers and dive instructors. Participation in the program involves extensive scuba diving activities, with training offered on site. ‘Since becoming operational in 2015, MCP has led mangrove replantation efforts, and have removed tons of marine debris and ghost nets. Volunteer divers have placed sinkers and buoys in many marine protected areas, improving demarcation and local conservation efforts, whilst volunteers have taught numerous school classes in the municipality about marine issues.’ Their YouTube channel is https://www.youtube.com/c/MarineConservationPhilippines Amongst several others, check out their video about conservation volunteering at https://www.youtube.com/watch?v=qA6hggVddfs

Marine Dimensions is a community driven enterprise dedicated to marine environmental education, research and conservation. With the aim of creating an appreciation of marine biodiversity through education, research and community based participation, they run workshops and courses for kids, teens and adults through their Ocean School programme. They also run summer camps, citizen science projects and community based research programmes.

Based in Gansbaai, South Africa, Marine Dynamics is a family of organisations dedicated to the marine environment. In conjunction with Dyer Island Cruises and the Dyer Island Conservation Trust, they are involved with various and diverse research and conservation projects concerning the Marine Big Five - penguins, whales, dolphins, seals and sharks - as well as educational and upliftment programmes in the local community. Current programmes/activities include an African Penguin nesting project, Great White Shark research including acoustic tagging and tracking, Fishing line disposal bin project, Shark egg case collection programme, Marine Animal Stranding rescue, research into the Southern Right Whale, Cape fur seal and Humpack Whale populations, amongst several others.

The goal of the Marine Dynamics Academy, is ‘to give people who love the marine environment a chance to immerse themselves within it, developing skills and experiences which they can use to enhance their own careers and life goals.’ Their experienced specialists train in three broad areas: Scientific internships, Marine-Coastal Guiding, and Marine Volunteers. The Academy is part of an umbrella organization which encourages ecotourism to further marine research and conservation goals. Gansbaai, where the Academy is based, is known the world over for the Marine Big 5, and especially for great white sharks

The Marine Institute (Foras na Mara) is the Irish national agency responsible for Marine Research, Technology Development and Innovation (RTDI)

The MMF conducts research on marine megafauna and uses scientific evidence to educate the public and government to influence long-lasting conservation strategies. Based in the US, MMF has a research center at Tofu Beach, Inhambane, Mozambique

The Marine Science Institute provides engaging and interactive hands-on adventures with San Francisco Bay Area marine life. Led by a team of expert marine science educators, these experiences impact students of all ages, inspiring respect and stewardship for the marine environment. The MSI provides a scientific experience and a memorable voyage into nature for students of all economic backgrounds. Students ages pre-K to College, engage in physical contact with the SF Bay and coast environments ‘to help cultivate their natural sense of curiosity, enrich their understanding of science, and foster a responsibility to protect the environment.’