Ocean Spirits is a registered, non-profit marine conservation organisation based in Grenada, focused primarily on the conservation of marine turtles. Their projects involve research on the local turtle populations with the aim to protect them, education and engagement with the local community in order to sustain the turtle populations and to combat turtle egg harvesting. Ecotourism forms part in their conservation initiatives.

A global conservation organization, Ocean Wise operates an number of programmes involving research and education regarding the threats facing the oceans, such as Ocean Wise Seafood which is a sustainable seafood program, Sea forestation which involves restoring, planting, managing and caring for underwater seaweed forests, their Cleanup programme and plastic pollution initiative, marine research and education

The Ocean & Climate Platform’s mission is to promote thinking and dialogue between the scientific community, civil society and political decision makers. Rallying 100 organizations across the world (research institutes, NGOs, foundations, science centres, companies and local and regional authorities) the OCP endeavours to foster scientific knowledge and promote solutions relating to the oceans in the context of tackling climate change. A leading organization of the ocean-climate community, the OCP enjoys observer status at UN conventions on climate (UNFCCC) and biodiversity (CDB), and participates in the French governmental review of IPCC reports.

Oceanic Global inspires us to care deeply for the ocean and provides solutions to protect it. The international non-profit sheds light on humanity’s essential relationship to the ocean and empowers individuals, communities, and industries to create positive change. Oceanic Global creates educational experiences, consults on sustainable operations, and engages local communities to generate measurable impact for our collective wellbeing.
Oceanic Global's industry solutions program, the Blue Standard (www.bluestandard.com), is a first of its kind cross-industry standard that empowers industries and businesses of all sizes to achieve measurable impact that protects our blue planet and establishes universal accountability for sustainable business leadership. Blue offers a 3-Star verification for business operations alongside open-source resources, step-by-step auditing and consultation support, and buying deals with vetted vendors to help businesses eliminate single-use plastics and operate sustainably. Blue also offers Product and Packaging seals that verify Consumer Packaged Goods for meeting Blue’s plastic-free criteria.

Oceanic Preservation Society (OPS) inspires, empowers, and connects a global community using high impact films and visual storytelling to expose the most critical issues facing our oceans, and our planet. Founded by former National Geographic photographer and dive enthusiast Louie Psihoyos in 2005, OPS films include Academy Award-winning The Cove (2009), Racing Extinction (2015), and The Game Changers (2019). OPS Projection Events have illuminated iconic buildings, including the United Nations Building (2014), the Empire State Building (2015), The Vatican (2015), and more recently, the Armadillo in Glasgow, Scotland during Climate COP 26 (2021). Visit their impressive website to Learn more about OPS’ films and impact campaigns, and the organization’s work to expose the truth and protect the planet.

The Oceanic Society works to improve ocean health by deepening the connections between people and nature to address the root cause of its decline: human behaviour. Focus is on: the consequences of pollution, carbon footprint and seafood choices.

Oceanologico conducts interdisciplinary research in the fields of marine biodiversity, environmental pollution (microplastics) and the relationship between humans and the ocean on the island of La Palma in the Canarian Archipelago. They also conduct snorkelling and diving tours and have an overall aim of improving ocean literacy generally.

Oceanosanos is a campaign created by the OCC (Cetacean Conservation Organization) in Uruguay to inform citizens about the threat to marine biodiversity of the current fishing model and to create propositional actions. They work 'to strengthen sustainable fishing, create marine reserves and combat ocean problems'.

Oceans Research specialises in investigating the biology and ecology of mega-fauna, including sharks, marine mammals and terrestrial carnivores. They advise governmental and non-governmental bodies on relevant conservation issues.

OCTO runs a number of programmes with the intention of connecting ocean professionals to the knowledge and networks they need, in order to ‘empower conservationists and resource managers to apply best practices worldwide’. The programmes include: Octo Webinars - helping ocean professional stay current on research and tools; MPA help - informing the management of MPAs; EBM Help - answering questions on ocean management and protection; Ocean Plastic list - sharing knowledge for fighting ocean plastic; and Siphonphore – making global communcations easier. Over 100,000 ocean professionals in 120 countries use OCTO programs each year.

Octonation aims at informing the public about octopuses.

Purely for information purposes, Only One is an online platform for sharing of 'stories, solutions, and community action to protect the ocean, tackle the climate crisis, and help build a more just, equitable planet'. Info about marine life features largely in the website and social media accounts