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This study was designed to assess the influence of dietary supplementation with Gum Arabic at various levels in Nile tilapia fish, Oreochromis niloticus. For 56 days feeding period, a total of 200 juvenile fish were allocated into 20 aquariums and divided into four equal groups, five replicates each, with Gum Arabic (GA) dietary inclusion as follow; the fish group was given a basal diet (CTR 0%); fish group fed a diet supplemented with GA 0.25%; fish group fed a diet supplemented with GA 0.5%; and fish group fed a diet supplemented with GA 1%. Dietary supplementation with 0.5 or 1% GA significantly improves final fish biomass, weight gain, weight gain percent, consumed feed, feed conversion ratio, innate immune response and antioxidant status compared to other treatments. The fish fed elevated levels of GA (1% GA) exhibited higher lipase and amylase activities as well as total protein, albumin, and globulin …