[4] Oposa co-founded Save Philippine Seas (SPS) in 2011,[4] which began as a social media campaign advocating for environmental protection and became an NGO in 2013.
[1] Through her work, the Municipal Mayor of Daanbantayan, Augusto Corro, issued an Executive Order to establish the country's first shark and ray sanctuary.
[5] Oposa is also a councilor on the World Future Council (WFC)[6] and has been a consultant on environmental issues for the Asian Development Bank and the Climate Change Commission.
She also became a Marine Conservation Action Fund fellow, which awarded her 50,000 Euros to build the first pelagic thresher shark sanctuary in the Philippines.
[8] Anna was also one of the 2021 The Outstanding Young Men (TOYM) Awardees for her significant contributions in the field of Environment Marine Conservation.