Marine tourism is an important part of the welfare of coastal communities. It even has an impact on environmental damage in tourism destinations. Environmental security needs to be considered to achieve sustainable tourism activities. Sustainable development is known to be applied in the marine tourism sector through the application of the blue economy concept. The researcher aims to explore sustainable development in the marine tourism sector that supports environmental resilience by implementing a blue economy. This study uses a qualitative method with a literature study approach. Data was collected through exploration of literature, documents, scientific journals related to research. The results show that sustainable marine tourism can be developed through ecotourism that pays attention to education, society, and the environment. Cooperation needs to be carried out between stakeholders, so that sustainable development and environmental security in tourism destinations can be maintained to maintain sustainable development and environmental security in tourism destinations.

Keywords : Environmental Security, Blue Economy, Maritime Tourism, Sustainable Development, National Security