The livelihood of many people in the small island state of Cabo Verde relies on healthy marine ecosystems. However, the pressure on such ecosystems increases due to multiple human-induced stressors. The lack of a systematic and coherent monitoring of the coastal marine environment makes the sustainable management of the marine ecosystems in Cabo Verde a challenge. CEM-CV is a blueprint study to achieve standards for ecosystem monitoring and management in an archipelago ecosystem such as Cabo Verde. The project developed standards for a coastal monitoring program in a data-poor region where no systematic ecosystem observations were in place. CEM-CV improved knowledge about various aspects of the marine coastal environment and the biodiversity around Cabo Verde, supporting evidence-based decision-making processes.