Through sponsorship, we educate and co-ordinate volunteers to remove rubbish from our marine environment', is the summary of what Sea Cleaners do. Their ultimate aim is to preserve New Zealand’s Coastline, by educating on disposal of rubbish in eco-friendly ways, including recycling. Clean-ups of waterways and oceans are conducted by volunteers. They are working with Hawaii to spread the message there too. Not to be confused with the Euroepean organization The Sea Cleaners (theseacleaners.org)

SFF informs and educates the general public, and children in particular, about the importance of the world's oceans and what threats are posed to the marine environment. By creating awareness, SFF tries to reduce or (preferably) stop the detrimental human influence on the oceans and all marine life, whether it be underwater or topside (like seabirds). SFF was founded by people who are involved in the oceans in many diverse ways, through work, training, hobby or general interest. Educational resources are available on its website (films)

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.

Sea The Bigger Picture (STBP) is a Cape Town-based environmental group who focuses on coastal environmental education, solutions for ocean pollution and marine pollution awareness. Their aim is to defend South African waters and beaches against marine litter through plastic pollution education, including via their Defenders of the Blue youth citizen science program, collaborative beach clean up events, talks and efforts to find alternatives to single-use plastic.

Sea Turtle Conservation Bonaire’s works to ensure that 'Bonaire’s sea turtles have a secure future, and to connect people to sea turtle conservation in ways that inspire caring for nature.' They do this by a variety of strategies, including satellite tracking, in water surveys, nest monitoring, rescue, seagrass protection, clean-ups including fishing line, education and advocacy.

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.

Belgian couple sailing around the Atlantic to raise awareness about plastic pollution in the oceans. Volunteer participant in Oceaneye’s citizen science project whereby sailors travelling around the world collect water samples, which Oceaneye then studies and maps, in order to raise awareness about marine microplastic pollution worldwide. Oceaneye's open source data is shared with international bodies for policy- and decision making: the European Commission, UNEP, G20 and IUCN.

Invented by Australian surfers, The Seabin Project provides solutions to remove pollution in waterways before it reaches the ocean. The V5 Seabin unit is a “trash skimmer” designed for marinas, yacht clubs, harbours, ports and any water body with a calm environment and suitable services available. The unit acts as a ' floating garbage bin skimming the surface of the water by pumping water into the device'. The Seabin V5 like a floating trash can that is effective in harbours and bays to collect floating debris, including micro plastics and micro fibres with an additional filter. The rim lies just beneath the surface of the water so nearby floating junk is pulled in. It uses a pump to act like a sinkhole and allow water flow to continue. Humans nearby need to check and empty it often.

In cooperation with local fishermen, NGOs and volunteers, the SEAQUAL INITIATIVE is fishing the plastic out of the ocean as well as cleaning the beaches. Plastic waste is a common by-catch of the local fishing industry and can be used for a good cause. The Seaqual Initiative uses this plastic to produce multifunctional materials. The organization brings together individuals, organizations and companies, to help clean our oceans, raise awareness of the issue of marine plastic and highlight the work being done to solve it. The recovered plastic is cleaned and transformed into Upcycled Marine Plastic at Seaqual Initiative approved facilities, and then returned to industry to be transformed into new, sustainable products. See the website for brand names involved.

Seas At Risk is an association of environmental organisations from across Europe, working together to ensure that life in our seas and oceans is abundant, diverse, climate resilient, and not threatened by human activities. Its mission is to promote ambitious policies for marine protection at European and international level. With over 30 members representing the majority of European countries

Operating since 2015, the amazing work of Seaside Scavenge has now been taken over by the award winning Australian charity Take 3 for the Sea which works to rid the ocean of plastic pollution. See https://www.take3.org/website take3.org