SeaBlue is a movement of Canadians holding government accountable for protecting our oceans and the fragile sea life that lives there. SeaBlue Canada is a collaboration of six organizations which work to protect Canada’s land and water, including Canadian Parks and Wilderness Society, David Suzuki Foundation, Ecology Action Centre, Oceans North, WWF Canada, and West Coast Environmental Law.

The Sea Change Project are a community of scientists, storytellers, journalists and filmmakers who are dedicated to raising awareness of the beauty and ecological importance of South Africa’s kelp forest.

Sea Change was an EU H2020 funded project that aims to establish a fundamental “Sea Change” in the way European citizens view their relationship with the sea, by empowering them, as Ocean Literate citizens, to take direct and sustainable action towards a healthy ocean, healthy communities and ultimately a healthy planet. Lasted 2015 - 2018. Not to be confused with Sea Change Project in South Africa, the producers of the documentary My Octopus Teacher.

SEA LIFE Trust is a global marine conservation charity, working to protect the world's oceans and marine life through projects, campaigns, and their marine animal sanctuaries – the Cornish Seal Sanctuary and the Beluga Whale Sanctuary. They support practical local projects to protect marine and freshwater wildlife and their habitats, alongside working on conservation campaigns to effect long-lasting change on a global scale. At the same time, they champion the need for plastic-free oceans, sustainable fishing, effective Marine Protected Areas, and an end to an over-exploitation of marine wildlife around the world.

SST was founded in 2010 Raja Ampat, Indonesia by experienced conservationists to protect this fragile and highly diverse ecosystem by creating Sea Sanctuaries. Dive surveys by leading marine biologists Dr Gerry Allen and Dr Mark Erdmann at that time recorded the second highest ever fish count on a single dive anywhere in the world on the east coast of the island of Piaynemo, indicating its high biodiversity and the importance of protecting it. In 2012, SST was able to establish and manage a Marine Conservation Area of 60 000 hectares around the island of Piaynemo. This ‘no take zone’ was created to protect this highly diverse and unique ecosystem to allow the recruitment of commercial fish species to recover. Currently, Sea sanctuaries is focussing on marine plastic pollution.

In their impact statement, Sea Save Foundation writes that the organization 'strives to protect our oceans by raising awareness about the beauty of marine ecosystems and their fundamental importance to human survival. We seek solutions, advance public policy, and drive advocacy.' Amongst their many projects, they have worked to attain UNESCO World Heritage status for Cocos Islands and Costa Riva, campaigned on banning shark fins in California, and to include many species on the CITES list

Sea Shepherd 'fights to defend, conserve and protect our ocean. We use direct action to defend marine wildlife and protect their habitat…'

Known for obstructing Japanese whaling activities in the Southern Ocean since 2005, Sea Shepherd Conservation Society is a Washington-based marine conservation organization with direct action tactics to save the oceans. Founded by Paul Watson, a former member of Greenpeace, in 1977, under the name Earth Force Society, the organization is involved in a number of 'controversial activities' to protect the ocean and marine life. Sea Shepherd Conservation Society carries out operations that involve direct, non-lethal tactics including scuttling and disabling whaling vessels, intervening in seal hunts and throwing bottles of foul-smelling butyric acid onto whaling vessels at sea, among others. As a response to the organisation's effort, the Japanese government has called Sea Shepherd eco-terrorists for impeding their research.

Formed in 1977, Sea Shepherd is an international non-profit organization whose mission is to stop the destruction of natural habitat and the slaughter of wildlife in the world's oceans in order to conserve and protect the ecosystem and different species. After the Sea Shepherd MV Steve Irwin flagship landed in La Spezia in July 2010, the Sea Shepherd group in Italy was officially born, legally represented by the Sea Shepherd Italia Onlus organization. Their projects including combatting illegal fishing in the Mediterranean and protecting marine protected areas, Syracuse being one such example.

Sea Shepherd Legal is a non-profit environmental law firm which is 'committed to saving marine wildlife and habitats by enforcing, strengthening, and developing protective laws, treaties, policies and practices worldwide'. Their focus areas include addressing the following: Inadequate species protection, Marine mammal exploitation, Illegal and irresponsible fishing, and Marine Habitat destruction.

Our mission is to protect defenceless marine wildlife and end the destruction of habitat in the world’s oceans. Since 1977, Sea Shepherd has used innovative direct action tactics to defend, conserve and protect the delicately-balanced biodiversity of our seas and enforce international conservation laws.' In New Zealand, as in all the other places Sea Shepherd is active, they challenge all instances where marine life is compromised, including plastic pollution and illegal fishing.

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.