This study examines the Sasi Laut ritual system practiced by the Indigenous Matbat community in Folley Village, Raja Ampat, to understand how customary marine governance shapes community-based economic practices. Using a qualitative ethnographic approach involving participant observation, in-depth interviews, and document analysis, the study interprets the findings through Indigenous Blue Entrepreneurship (IBE), proposed as a conceptual lens that synthesizes insights from Blue Entrepreneurship and Indigenous Entrepreneurship. The findings show that Sasi Laut functions not only as a customary institution for marine conservation but also as a system that integrates Indigenous ecological knowledge, customary governance, marine-based innovation, and communal economic practices. The involvement of the church and conservation organizations has contributed to the transformation of Sasi Laut while reinforcing its role in supporting sustainable livelihoods. At the same time, the system faces challenges from external resource exploitation and socio-cultural change. This study contributes to discussions on Indigenous entrepreneurship and sustainable marine resource governance by demonstrating how Indigenous economic practices are embedded in reciprocal relationships among culture, ecology, and community well-being.
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