Founded by Nikki Helgason, this is a web-based initiative devoted to all things to do with corals, in particular coral identification and coral restoration.

Operating in Madagascar, Reefdoctor is a UK based charity working on conservation and social development projects, including coral reefs, mangroves, turtles, marine pollution, fisheries, aquaculture and education

Refugium2 is a hostel in Tirana, Albania with great ambitions, specifically a project to protect the ocean. Their mission: 'We want to build the first artificial reef in Albania to protect & grow the fish stock in the Mediterranean Sea'

Roatan Divers work with the Roatan Marine Park on conservation programmes, specifically on coral reef restoration and on the eradication of the invasive lionfish

RMP was started by a group of concerned divers and conservationists to protect Roatan’s reefs and ecosystems. They are 'dedicated to the conservation of Roatan’s protected marine and coastal area including all of its flora, fauna, physical and biological characteristics and phenomena, and historical and cultural resources'. They achieve this by a number of practical initiatives, including conducting research into marine species such as sharks, turtles and corals while involving the public in citizen science projects, by creating marine infrastructures so as to minimize damage to reefs such as moorings management, by educating via outreach programmes to local communities and divers, amongst others. In addition, they have a lionfish eradication programme.

The Roctopus ecoTrust is a marine ecology and conservation programme that is based on the island of Koh Tao, situated in the Gulf of Thailand. This programme provides divers and ocean enthusiasts with an in-depth education on coral reef ecosystems, and offers a platform for individuals to directly engage in underwater research and reef conservation efforts. From their several monitoring, research and active conservation projects around the island, the data allows for continual assessment the health of surrounding reefs, and provides essential information on trends that may develop in the health status and biodiversity of local reefs. The Roctopus ecoTrust aims to develop scientifically proven, effective, and sustainable methods to protect and conserve the reefs of Koh Tao, allowing these vital ecosystems to thrive in the future. The information they gather is also siubmitted to a number of large global databases, thus providing information on the health status of reefs across the world, as well as the threats that these ecosystems face on a global scale.

SECORE is an international organization focused on coral reef conservation through research, education, outreach, and restoration. The group has over sixty supporters in North America, Europe and Japan, and comprises public aquariums, institutes, and universities.

SaveNature.org works to protect coral reefs through its 'Adopt a Reef Program' to raise funds for the conservation of threatened and endangered coral reefs and their surrounding marine ecosystems around the world; specific reefs: Palau in Micronesia, and Parque Nacional Del Este in Dominican Republic. Their Adopt a Reef program is only one aspect of their work which covers the preservation of fragile ecosystems in general through creating awareness via education and direct participation projects. They work closely with schools, universities, zoos, aquariums, botanical gardens, natural history museums, and science centers worldwide, as well as corporations and businesses, to achieve their aim of protecting the diversity of life in fragile ecosystems.

"Scaph Pro" association manages underwater maintenance and development programs involving artificial reefs in order to regenerate coral reefs, bringing together a multidisciplinary team made up of sea professionals, professional divers, scientists, oceanographers, archaeologists, photographers, architects etc. Photographs of their projects in the Philippines can be seen on their Facebook pages

Award-winning organization Sea Women of Melanesia focuses on empowering women in Papua New Guinea and Solomon Islands with the training, skills, equipment, and resources they need to take an active role in helping indigenous communities create and manage marine protected areas on their own coral reefs. To date (2022) over 30 women have been trained through the program, and it has led to more than 20 new marine reserve areas being proposed and surveyed in high conservation-value locations in the coral triangle marine biodiversity hotspot. The initiative is supported by the Australian organization Coral Sea Foundation and its partners.

The Sea of Change Foundation funds conservation and research initiatives that directly impact the marine world, including coral reefs restoration, ocean pollution, and protection of threatened species and habitats internationally.

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.