Abstract This research aims to determine the effect of basil leaf extract (Ocimum sanctum) on the quality of fresh nile tilapia (Oreochromis niloticus) during storage at room temperature in terms of microbiological, organoleptic, and chemical parameters. The treatments are given consisted of K0 (control), K1 (10% basil leaf extract), K2 (15% basil leaf extract). The analysis parameters obs…