The effects of crude plasma and ethanol-extracted swamp eel at different concentrations (0, 0.25, 0.5, 0.75, 1, 1.5, 2 mg/g) as inhibitor protease in the quality tilapia (Oreochromis mossambicus) surimi were investigated. parameters analyzed gel strength, expressible moisture, whiteness, microstructure, protein solubility, hydrolysis pattern by sodium dodecyl sulfate-polyacrylamide electrophore...