<![CDATA[Indonesia is known as the country with the largest archipelago in the world, making it a country with enormous potential for marine tourism. Maritime tourism has the potential to contribute significantly to the country's economic growth, but this development can also have a negative impact on the marine ecosystem. This study aims to analyse the protection of marine ecosystems that are disturbed by maritime tourism activities. The method used is normative juridical with a statute approach. Primary legal materials include Law No. 32 of 2009 concerning Environmental Protection and Management, Law No. 1 of 2014 concerning Coastal Zone and Small Island Management -Small Islands, Law Number 18 of 2025 concerning Tourism, Government Regulation Number 22 of 2021 concerning the Implementation of Environmental Protection and Management, and Regulation of the Minister of Marine Affairs and Fisheries Number 28 of 2021 concerning the Implementation of Marine Spatial Planning. Secondary legal materials, such as literature, journal articles, law books, and expert opinions supporting this research. The results of the study show that marine tourism activities have several regulations to govern them through provisions aimed at preserving the marine ecosystem. These regulations were created to provide restrictions and guidelines for the use of the marine ecosystem as a marine tourism object in order to prevent damage caused by marine tourism activities, thus requiring the role of various parties to avoid these negative impacts.]]>
