Seagrass ecosystems are increasingly recognized for their ecological, climate-regulation, and socio-economic importance, yet the development of seagrass research in Indonesia remains fragmented. This systematic review examined research trends, dominant themes, knowledge gaps, and conservation implications of Indonesian seagrass studies published during 2015–2025. Literature was retrieved through Google Scholar using Publish or Perish and screened following the PRISMA 2020 framework. Twenty original research articles met the eligibility criteria and were synthesized using descriptive quantitative analysis and thematic content analysis. Publication output was uneven, with the highest concentration in 2023 (7 articles; 35%). Blue carbon and ecosystem services were the dominant theme (35%), followed by conservation and restoration (30%), while biodiversity and distribution (15%), coastal management and socio-economic dimensions (15%), and ecological processes (5%) were less represented. The evidence indicates substantial thematic and methodological imbalance, particularly in long-term monitoring, ecological processes, governance, socio-economic assessment, and integrated spatial approaches. Future research should prioritize standardized national monitoring, long-term restoration assessment, satellite–field integration, ecosystem-service valuation, and social–ecological governance. A more balanced and interdisciplinary evidence base is essential to support effective seagrass conservation, climate mitigation, and sustainable coastal management in Indonesia.
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