This research is based on the issue of sharks being caught by the fishermen at Tanjung Luar, East Lombok. According to an international agreement on the protection of endangered species and Indonesia’s national law, the activity of shark-catching should be limited or even prohibited. Nowadays, sharks as the top predator in the ocean are in the critical condition. Therefore, slow propagation, the limited number of babyshark, and long life cycle, makes them vulnerable against exploitation. This study aims to further investigate on Indonesia’s obligation based on international and national law related to the protection and conservation of sea natural resources, on which shark fishing is the primary case. In principle, this research is normative-legal research. The empirical research onducted by interview and observation are intended to complete the primary data. As the biggest archipelago state, Indonesia is obliged to obey its obligations under international law. The loss or damage of certain species, in this case, the shark in Indonesia will be affecting the global situation. However, the efforts to supervising the shark sale in Tanjung Luar should be the main concern for both local and central government.