SeaForester is an environmental impact company dedicated to restoring the forgotten forests in our ocean, by developing sea forestation projects with coastal communities and providing training to local partners, and at the same time organizing project funding to finance sea forestation in targeted areas. They test and optimise sea forestation techniques and monitoring approaches, drive technology development, and gather data on ecosystem services. Their particular solution involves ‘green gravel’, whereby seaweed spores are seeded onto small stones and scattered into the ocean. The stones latch on to the underlying reef, the seaweed grows and multiplies, spreading across the ocean floor. They are also engaged in create awareness, assist in local education and communicate global sea forestation efforts. 2022 Finalist for The Earthshot Prize

A programme of Sustainable Surf, a California-based non-profit organization, SeaTrees is working to plant one million “sea trees”—mangroves and kelp—to fight climate change. Their stated mission is to 'protect and restore coastal ecosystems globally, to protect ocean health and fight climate change. Their projects include mangrove planting in Asia, Africa, and the US, and coral restoration initiatives in Asia.

Seacology’s mission is 'to protect threatened island ecosystems all over the world'. This they do by working directly with communities, helping them to preserve their cultures and improve their lives while saving precious island habitats. Many of their new projects involve protecting key marine ecosystems—coral reefs, mangroves, and seagrass—all of that uphold biodiversity in our oceans.

Seaforestation is an information website aimed at educating the world on the benefits of seaweed afforestation and cultivation to help reverse climate change and to create healthier ocean ecosystems. In addition to their resources about seaweed, their website has an extensive directory of seaweed companies and initiatives

Seagrass-Watch raises awareness on the condition and trend of seagrass ecosystems. The Seagrass-Watch program has a simple philosophy of involving those who are concerned, and involves collaboration/partnerships between scientists, community and the data users. Seagrass-Watch global seagrass observing network accurately monitors the status and trends in seagrass condition. The network has conducted over 5700 assessments at 408 sites across 21 countries, involving thousands of dedicated participants.

SeagrassNet is a worldwide ecological monitoring program that investigates and documents the status of seagrass resources and the threats to this important and imperilled marine ecosystem. The program started in 2001 in the Western Pacific and grew to include 126 sites in 33 countries with a global monitoring protocol and web-based data reporting system. Their ultimate aim is to preserve the valuable seagrass ecosystem by increasing scientific knowledge and public awareness of this threatened coastal resource. (extracted from their website.) Confirmation needed to establish whether still active.

The mission of the Seaweed for Europe coalition is to accelerate the sustainable seaweed industry in Europe. This is to be achieved by driving systematic innovation and best practice sharing whereby members exchange knowledge and an understanding of research and technology needs; by mobilising investment into the industry in order to contribute to a sustainable ocean economy; and by elevating the profile of seaweed, its potential and the importance of the contribution it makes to the health of the planet.

Within Singapore’s National Parks agency, ‘the Coastal and Marine Branch under the National Biodiversity Centre (NBC) works towards Singapore’s adoption of a proactive, balanced and forward-looking approach to coastal and marine environment-related policy, management, and research-direction issues, consistent with Singapore’s long-term economic and sustainable development goals.’ Specifically mentioned are the local coral reefs, the intertidal zone, and the mangroves in the area.

The Song Saa Foundation 'initiates and promotes projects that improve the wellbeing of the communities and natural environments of the Koh Rong Archipelago and beyond.' In 2006, they bought the tiny Cambodian island of Koh Ouen and later, the neighbouring island of Koh Bong, and launched the Song Saa Marine Reserve, Cambodia’s first ever government recognised private marine reserve. The foundation is ‘committed to the protection of ocean habitats and the preservation of marine life – from fish and invertebrates to coastal birds – in the Koh Rong Archipelago and all along Cambodia's coastline. Our projects include the support of community fisheries, a coral nursery and a tropical marine conservation programme. We also have programmes in place for the conservation of sea turtles, mangroves and Cambodia’s rare sea grass meadows.’ They run an Ocean Stewardship Program for divers interested in becoming involved in their conservation initiatives.

The Sri Lankan Mangrove project is one of Seacology's programmes aimed at protecting ecosystems

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.

The longest serving environmental and heritage membership organisation on the island, SLNT has a legal mandate to conserve both the natural and cultural heritage of Saint Lucia. Amongst the many programmes of SLNT undertakes in support of this objective are several to do with the marine environment, including sea turtle monitoring, ecosystems assessments such as that of Pigeon Island’s marine ecosystems (including coral reefs and seagrass meadows) and a mangrove forest assessment on Ma Kote.