Abstract This study aims to explore the relationship between the diversity of coral fish resources and ecosystem services as added value in the development of sustainable Special Economic Zones (SEZs). The existence of SEZs has become an economic focal point, making the balance of the natural environment increasingly crucial to support long-term economic growth. Data collection for this research was conducted through field surveys to assess the diversity of coral fish resources, including species, abundance, and distribution in Tanjung Lesung. The data was further analyzed to determine the added value of ecosystem services to SEZ development, which includes provisioning services and cultural services. The results of the study revealed a significant relationship between the diversity of coral fish resources and ecosystem services in the area. High levels of species and resources diversity positively contribute to food availability for communities, as well as enhancing cultural services, such as tourism. Additionally, coral fish naturally plays a vital role in maintaining ecosystem balance and ensuring the survival of other species in the food chain. The findings of this research provide a deeper understanding of the importance of sustainability and governance of coral fish resources in supporting the development of SEZs. This study also serves as a foundation for policy planning that focuses on responsible and sustainable utilization of coral fish resources to achieve balanced long-term economic development in harmony with aspect of environmental conservation.