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Not AvailableThe physicochemical properties of muscle proteins extracted from two different weight groups (500 and 1500 g) of barracuda (Sphyraena jello) are discussed. Solubility of sarcoplasmic protein (SPP) from groups I and II fishes were 107 and 167.18 mg per g, respectively. The myofibrillar protein (MFP) concentration was significantly higher in group II. The concentration of reactive sulphydryl group and Ca2+ ATPase activity of MFP were higher in group II fishes than in group I fishes. Surface hydrophobicity of MFP was noticeably higher for group I fishes compared to the other group. High emulsion activity index (EAI) was noticed for group I fishes. EAI of SPP increased but that of MFP decreased with increase in protein concentration in both the fishes. MFP from group I fishes showed better emulsion stability (ES) and the ES showed concentration-dependent increase in both groups for both SPP and MFP. Foam expansion was higher in group I fishes, but foam volume stability (FVS) of both the groups did not show any significant difference. Viscosity, water holding capacity (WHC) and gel strength (GS) were higher for group I fishes. Electrophoretogram of SPP and MFP of both the groups show difference in band pattern indicating that proteins expressed during various stages of growth vary.Not Availabl