This study aimed to determine the effect of belimbing wuluh (Averrhoa bilimbi L.) leaf extract on the shelf-life quality of fresh Pangasius sp. fish and to determine the optimal concentration of the extract. The study used a completely randomized design (CRD) with non-factorial treatment, consisting of four levels of extract: (P0) no extract, (P10) 10% extract, (P15) 15% extract, and (P20) 2…