IOI trains young and mid-career practitioners in contemporary approaches to coastal and ocean management, with an emphasis on the moral, ethical and legal values in Ocean Governance (equity and peaceful uses of the ocean). Since its foundation in 1972, IOI has trained hundreds of young practitioners, particularly from developing countries and countries in transition, and contributes towards a growing global network of trained and empowered leaders fully conversant with the latest developments in ocean governance. IOI has centres in several places internationally, including Canada, China, South Africa, Brazil, Costa Rica, Nigeria and Thailand.

Hosted by the Zoological Society of London, IPSO focuses on the many factors that threaten the health of Earth's oceans, including overfishing, ocean acidification, habitat destruction, alien species and marine pollution.

SeaKeepers is an organization that unites the yachting community with the scientific and educational communities to facilitate conservation. Via their extensive range of programmes, they educate about the marine environments of the world and help restore them. Marine Science and conservation is supported by utilizing member yachts as platforms for marine research, educational outreach, and to deploy oceanographic instruments. These efforts eliminate vessel costs and allow scientists and educators to maximize funding towards research and education. Additionally community engagement programs promote conservation awareness and unite local participants in beach and dive clean-ups.

The International Union for Conservation of Nature (IUCN) is a membership Union uniquely composed of both government and civil society organisations. It provides public, private and non-governmental organisations with the knowledge and tools that enable human progress, economic development and nature conservation to take place together. Famous for its Red List of Threatened Species Amongst the many programmes and specialist groups that are under the auspices of IUCN are the following: Global Marine and Polar Programme, Species Survival Commission, High Seas Task Force

Since 1991, the Ionian Dolphin Project, a project of the Tethys Research Institute, aims to ensure the long-term viability of marine mammals, dolphins and Mediterranean monk seals, living in coastal waters of the eastern Ionian Sea. Dolphins and Mediterranean monk seals inhabiting the coastal waters of Greece are facing significant threats. Some of them must deal with increasing human encroachment, while others have disappeared altogether from portions of their former range. The research is concentrated primarily in these three Natura 2000 areas: the Inner Ionian Sea Archipelago (common dolphins, bottlenose dolphins and Mediterranean monk seals), the Gulf of Ambracia (bottlenose dolphins), the waters surrounding the islands of Paxoi and Antipaxoi (bottlenose, common and striped dolphins). Their work includes: continued monitoring of marine mammals through field research methods; monitoring threats to local marine ecosystems (pollution and overfishing); public awareness, education and capacity building initiatives; establishing synergies with stakeholders aimed to raise awareness on the need of developing measures to protect marine mammals and implement existing regulations; dissemination of information in the scientific literature and delivery of management proposals to international agreements and bodies concerned with the protection of marine biodiversity.

The Ionian Environment Foundation (IEF) works to preserve the Ionian Islands’ exceptional nature and beauty through promoting and supporting a sustainable approach to their way of life, tourism and socio economic development. The foundation is set up to pool funding from supporters of the Ionians and to distribute those funds to effective and deserving local environmental initiatives. Key criteria for funding: protecting, sustaining, restoring and raising awareness of the islands’ natural environment, as well as to promote and work on sustainable ways of living and operating.

Irish Whale and Dolphin Group (IWDG) is dedicated to the conservation and better understanding of whales, dolphins and porpoise in Irish waters. They involve the public asking them to report sightings and strandings

The Irish Wildlife Trust works to create a better future for Ireland’s biodiversity, including the marine environment, by motivating and supporting people to take action to protect biodiversity. This includes wildlife walks and talks, citizen science projects, community & school education, practical conservation activities, and biodiversity campaigning and advocacy.

Island Conservation’s mission is to prevent extinctions by removing invasive species from islands. Restoration of terrestrial ecosystems has cascading benefits for marine environments, making it possible to build more resilient oceans, especially within the boundaries of Marine Protected Areas. Island Conservation support the work of conservation organizations worldwide including those working on marine biodiversity and fisheries conservation. Active in the Caribbean, Asia, North American and South America, including Chile and the Galapagos,

IMMRAC is a non-profit organization dedicated to the study and conservation of cetacean populations that inhabit the Eastern Mediterranean and the Gulf of Aqaba/Eilat.

ISPRA supports the Ministry of Environment, Territory and Sea in several environmental matters including marine protection policies and marine observation. It owns an oceanographic vessel

The stated aim of SIBM is 'to carry out activities in the field of protection and enhancement of nature and the environment, promoting studies relating to the life of the sea, promoting contacts between researchers and disseminating theoretical and practical knowledge deriving from modern progress.' As a professional society, the main activities of the SIBM include the organization of congresses, seminars, round tables, monographic courses and the care of publications, in particular the Newsletter and the journal Biologia Marina Mediterranean.