Quality of whole Nile Bolti fish (Tilapia nilotica) stored under refrigeration at 4±1°C after dipping in aqueous solutions (2 liter of dipping solution: 1 kg of fish) of acetic acid (AA, 1%), citric acid (CA, 3%) and mixture of (1% AA+ 3% CA) for 5 minutes was investigated. Changes in physicochemical parameters (chemical composition, pH, thiobarbituric acid values (TBA), total volatile basic nitrogen contents (TVB-N), water holding capacity (WHC) and plasticity) were evaluated during 12 days of storage. The data revealed that, the suggested treatments were significantly affected the chemical composition, especially for the lipids and protein contents. Sample dipped in acetic acid (1%) had significantly lower pH value (5.95), at the end of storage time than the control and other treated samples. The highest values of WHC during storage were given by fish samples treated with CA followed by AA and its combination with CA. Significant reduction in TBA concentrations and total TVB-N in fish samples treated with selected organic acids was assessed when compared to control. In conclusion, the results found that acetic acid and citric acid solutions, especially in combinations, can be utilized as safe organic preservatives for Boltifish under refrigerated storage up to 12 days.