The Organization for the Conservation of Cetaceans (OCC) in Uruguay works for the conservation of the marine ecosystem as well as the environment of the coastal communities, thus integrating ecological, socio-cultural and economic perspectives. They focus on marine conservation environmental education and awareness, responsible marine tourism, sustainable fishing and the creation of offshore MPAs.

The Omcar Foundation was created in 2007 for the conservation of dugongs, seagrasses, and mangroves through scientific and traditional knowledge. Under the foundation’s auspices, the OMCAR Palk Bay Centre provides services to the local fishing communities in coastal environmental education and awareness, a dugong and marine mammal stranding response, seagrass and mangrove restoration projects, sustainable squid fishery, tree planting, amongst others. Participatory conservation and sustainable livelihoods are key to their mission.

ORCA Peru operates multiple bases along the Peruvian coast and is focused on balanced marine conservations efforts. They conduct research and rescue of sea-lions, dolphins, marine otters, whales, sea turtles and penguins, promoting sustainable development and the conservation of a healthy marine ecosystem, preventing and monitoring the cumulative effects of human impact through advanced research, animal welfare strategies, and innovative education campaigns promoting marine mammals as sentinels of the ocean, from the Eastern South Pacific to the world.

Through research and conservation projects, campaigns, environmental education, and involvement in a range of important international committees, OceanCare undertakes concrete steps to improve the situation for wildlife in the world’s oceans. In 2011, OceanCare was granted Special Consultative Status on marine issues with the Economic and Social Council of the United Nations.

Ocean Champions appears to be inactive (mid-2022). It was a political advocacy organization dedicated to protecting the ocean and its wildlife, and focused on building champions for ocean conservation in the U.S. Congress.

Two time recipient of the Project Aware Environmental Achievement Award, Ocean Frontiers has a history of conservation and environmental projects, including the installation of Grand Cayman's biggest coral nursery where Staghorn and Elkhorn fragments are grown and out-planted to reefs which have coral loss or damage. Other projects include culling the invasive Lionfish, coral bleaching monitoring, coral spawning data collection, shark conservation and tagging, amongst others.

Jean-Michel Cousteau's society, Ocean Futures Society is committed to educating the public on marine conservation and finding sustainable solutions to protect our ocean planet. From creating educational programs around the world that immerse children in nature, to communicating the importance of sustainable living, to producing documentaries that shed light on the state of the planet.

ORCA describes itself as a technology-based marine conservation association. Their strategy is to collect accurate and scientifically defensible data on water quality and its impact on marine ecosystems, to provide the data to the public and decision makers in an easily accessible and understandable format, and to engage communities in marine conservation action, with positive reinforcement for their efforts through feedback involving easily understandable scientific data. Focus of research is on the Indian River Lagoon.

Problems accessing website Jan 2023. Ocean Sanctuaries is dedicated to supporting marine citizen science. They offer citizen science programs for both divers and the general public, with the aim to foster greater understanding, wise ecology, species protection and good stewardship of the ocean and related habitats. Ocean Sanctuaries mission is to inspire people to take action around ocean conservation and habitat preservation.

The OceanCanada Partnership is a Social Sciences and Humanities Research Council (SSHRC) project that brings partners from across Canada together to holistically study the challenges and opportunities facing Canada’s oceans and coastal communities, and is aimed at building resilient / sustainable oceans on all Canadian coasts and supporting coastal communities as they respond to rapid and uncertain change

OceanWatch Australia Ltd is a national environmental company that works to advance sustainability in the Australian seafood industry. They operate community based coastal habitat restoration programs, working on a broad range of projects to improve environmental practices, protect marine species, reduce by-catch, introduce sustainable technologies, change behaviours and restore marine habitats.

Oceana is a Washington D.C based ocean conservation and advocacy organisation committed to save and restore oceans through targeted policy campaigns. Founded in 2001, Oceana is the largest international advocacy organization exclusively working for the conservation of ocean. The organisation carries out targeted campaigns to prevent the collapse of fish populations, marine mammals and other damages to sea life resulted from industrial fishing and pollution. As part of its campaigns, Oceana is involved in efforts to end major sources of ocean pollution such as oil, mercury, aquaculture and shipping emissions. In addition, the organisation also campaigns for the protection of vulnerable places in the oceans, including the Arctic, the Aleutian Islands, the Mediterranean and Chile's Juan Fernandez Islands, among others. With a local presence in many countries around the world, it is truly global in its reach. Individual records exist in this database for its operations in US, Europe, Chile, Canada, Belize, Philippines, Brazil, Peru and Mexico.