The marine fish supply chain (MFSC) exhibits inherent vulnerabilities due to rapid product deterioration, fluctuating price dynamics, and weak inter-actor coordination, all of which constrain overall operational performance. This research pursues three primary objectives: (1) to assess MFSC performance, (2) to examine MFSC performance through key metrics grounded in the Supply Chain Operations Reference (SCOR) framework, and (3) to develop performance enhancement strategies by integrating SCOR with the Analytical Hierarchy Process (AHP) in the context of the Seahood Fresh Market (SFM). The empirical investigation was undertaken across Sleman Regency, Kobong Market in Semarang, and Jepara. Findings indicate that the MFSC comprises multiple interconnected stakeholders, including fishermen, fish auction intermediaries, assembling traders, wholesalers, and SFM. Evaluation across SCOR dimensions—reliability, responsiveness, cost efficiency, and asset utilisation—demonstrated that fish auction intermediaries attained the highest performance rating (3.55 on a five-point scale), underscoring their pivotal role in coordinating supply chain activities. Furthermore, SFM in Sleman Regency emerged as a critical node within the MFSC network. To strengthen overall system performance, several strategic interventions are proposed, including optimisation of inventory control practices, establishment of long-term collaborative partnerships, provision of fuel-related financial support, and implementation of regulatory guidance alongside capacity-building initiatives.