This report details a value chain analysis to identify opportunities to improve the competitiveness of the aquaculture sector. Methodology involved interviews with value chain members in Bali, Nusa Tenggara Timur, Aceh, Sumatra Utara, Sumatra Selatan, Java Barat and Jakarta as well as government officials and desk top research. The report details the marine, shrimp and freshwater aquaculture value chains in Indonesia incorporating market demand, value chain participants, input supply, production technology, trading, processing and consumers and the key constraints and potential solutions for each value chain. The authors identify three target subsectors for intervention based on comparative advantages and their potential to increase Indonesia's competitiveness. These are summarised as: development of grouper grow-out production system and markets; development of value adding processes, cold chain and supermarket linkages for freshwater aquaculture in Jakarta; and development of Indonesian shrimp branding globally based on best aquaculture practices to meet international consumer demands for food safety and traceability. Key steps required to implement the suggested interventions are also listed.