Seastainable is a social business that supports marine conservation in Singapore and around Southeast Asia. They do this by encouraging individuals to reduce their plastic consumption, organise cleanups, and offer packages for sale in support of conservation efforts, such as a coral package. Since beginning, Seastainable has contributed funding for 33 conservation projects in five countries (Philippines, Malaysia, Singapore, Brunei, and Indonesia) and impacted individuals in local communities through these initiatives.

The South African Whale Disentanglement Network (SAWDN) is a non-profit organization, collaborating with local and international organizations to reduce the suffering of entangled cetaceans, by releasing entrapped cetaceans in active fishing gear (including abandoned, lost or discarded gear). SAWDN provides a dedicated rescue action plan to assist entangled whales, prevent injuries and reduce mortalities to whales by removing gear as safely as possible. At the same time they collect data for international and national reporting of statistics to the International Whaling Commission and scientific purposes. SAWDN is also committed to working with the fishing industry to reduce entanglements. The network consists of multiple organizations in South Africa, including NSRI, SA National Parks, Mammal Research Institute, CapeNature, amongst many others. Telephone: 0726619516

Based in Kalpitiya in Northwest Sri Lanka, SLWCS's Marine Project addresses the conservation issues affecting Sri Lanka’s marine wildlife and is also providing opportunities for ecotourism and alternative livelihoods to promote sustainable development in the area. Their aim is to collect information about the current state of the area, including sea turtle, shark, dugong and pink dolphin conservation via nesting surveys, monitoring programmes, in-situ hatching projects, as well as educational workshops, beach clean-ups, mangrove planting, and waste management schemes. They also have an office in Nutley, New Jersey in the USA.

Stigting De Noordsee is a foundation which focuses on North Sea issues, including sustainable fishing and pollution.

Submon aims to conserve marine biodiversity and to achieve the sustainable use of the marine environment by promoting a change in the relationship between society and the sea, through on-site actions and using and transmitting knowledge. The organization develops its own projects, mainly directed towards the conservation, the study and awareness of the marine environment, and always with a clear social and sustainable development character.This includes is a strong programme for schools and on ocean literacy. Their many and extensive projects include research and protection of whales, dolphins, sea turtles, molluscs, seagrass meadows, amongst others. An influential body, their expertise is widely sought after internationally.

Through volunteering programs, community action, conservation, campaigning, education, and scientific research, Surfers against Sewage empower communities to take action to protect beaches, marine life, and surf spots. Their main focus is cleaning the beaches from sewage, but now they are working on marine plastic pollution too. According to them, 'Plastic pollution is the new sewage. Tackling it is our number one priority.'

Surfrider Foundation is a grassroots non-profit environmental organisation that is dedicated to the protection and enjoyment of the world’s oceans, waves and beaches, for all people, through a powerful activist network. Founded in 1984, the Surfrider Foundation has evolved into one of the largest non-profit grassroots organizations in the world with a volunteer-activist network dedicated to protecting our coasts and ocean. With more than 80 chapters, 100 student clubs and thousands of supporters, Surfrider's volunteers and activists are fighting over 100 active campaigns around the country at any time. Equipped with an activist model to defend our coasts, the organization has recorded nearly 800 victories since 2006. Surfrider's programs, including beach cleanups, volunteer water quality testing (Blue Water Task Force), and Ocean Friendly Gardens, remove approximately 170,000 pounds of trash from US beaches annually, and sample water quality in nearly 800 sites across the country. Surfrider has active international affiliates in affiliates in Japan, Argentina, Australia, Senegal, and throughout Europe. Sometimes referred to as Surf Rider Foundation (not correct, but not uncommon!)

Surfrider EU is dedicated to the protection of the ocean, lakes, rivers, the coastline and waves, and the people who enjoy and appreciate them. Created in 1990 in Europe (Biarritz, France) by surfers, including 3-time World Surfing Champion Tom Curren, the organisation brings together today about 2,000 volunteers, 13,000 members, more than 40 local chapters active in 11 European countries, and 150,000 supporters in Europe. Sometimes referred to as Surf Rider Foundation (not correct, but not uncommon!)

Sustainable Coastlines enables people to look after the places we love, by coordinating and supporting large-scale coastal clean-up and waterway restoration events, education programmes and public awareness campaigns.'

Founded in 2014, Sustainable Ocean Alliance (SOA) activates young people, develops and implements innovative solutions, and ‘mobilizes an ocean workforce to restore the health of the ocean in our lifetime’. By supporting innovative startups, nonprofits, and grassroots campaigns through publicity, funding and grants, they are actively working on solving the problems faced by the oceans, including via technological and scientific solutions. As of 2021, they had become involved in 222 initiatives all over the world, each dedicated to restoring and sustaining the health of our ocean focusing on the following 5 general categories of solutions: Carbon (CO2) reduction and blue carbon; Pollution reductions and the circular economy; Blue Foods (Sustainable protein, fisheries and aquaculture); Ocean data, literacy and research; and Ecosystem preservation and restoration.

Sustainable Seas Trust (SST) is a science-based organisation that works to protect Africa’s marine resources for the benefit of all who live on the continent, supporting and connecting communities across Africa, via research, education, enterprise development and growing awareness about ocean conservation and plastic pollution. They build networks for sharing information and support focused on waste management. Through events such as the 2020 Second International Conference of the African Marine Waste Network and projects, SST brings like-minded and passionate people together, locally and internationally, to manage the issues of plastic waste in Africa.

Sustainable Surf seeks to transform the surf industry and community by convincing them to make more sustainable choices. They address environmental issues such as climate change, marine plastic pollution, and water quality, and believe that part of the solution lies in educating surfers about the impact their lifestyle choices have on the environment and in changing the way surfboards are being manufactured. Programs include: The ECOBOARD Project, SeaTrees, Deep Blue Events, Waste to Waves and Deep Blue Life.