This study aimed to determine isolates of the mudskipper fish protein (Periopthalmus minutus) with different pH values. This methods was of this research consist of three stages, that is: 1) fish meat preparation. 2) manufacture mudskipper flour. 3) making fish isolates. This research used a completely randomized design (CRD) with 6 levels of treatment that is:(P1 = pH 9 and pH 4, P2 = pH 9 a…