This report offers an overview of the work by the Save our Mangroves Now! (SOMN) initiative in the region to date, bringing together data on extent, loss and gains, and the socio-economic value of mangroves in the region, as well as governance challenges and policy opportunities. We hope this will support national efforts and inform the development of a regional mangrove action plan in the Western Indian Ocean region, enabling coordinated and collective action on mangrove conservation and restoration. In addition, we created the guiding principles on sustainable mangrove ecosystem management and aspire for them to guide the design of collective action at the national and regional level in the Western Indian Ocean region and beyond.