Why should society conserve oysters, enrich its habitats and river ecosystems, including coastal mangrove forests? How can oyster conservation and mangrove restoration be done collectively and greenly to advance climate action, biodiversity and ecosystem services? What contributions can conservation make to the UN SDGs and green recovery from the triple COVID-19, economic and climate crises? What opportunities exist for children and young people to learn, engage in and benefit from biodiversity conservation? How can local leadership, institutions and resources be mobilised to support and sustain conservation, restoration and livelihood interventions? Inclusive conservation of oyster ecosystems requires partnering and financing, would you help? How can we appropriately integrate indigenous knowledge, human values and scientific technologies to own, transform and reconnect community-based conservation to bioculture, health, education, science and blue-green economy for sustainable development? You can be a powerful voice, share relevant information and, at the same time, lend a practical solution for resolving climate and sustainability challenges.