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The development of plant ingredients as an alternative to fish meal (FM) has received sustained interest in the aquaculture sector. The study investigated the replacement of FM with different percentages of dietary fermented soy pulp (FSP) to assess the growth performance, haematology, blood biochemical, liver, and gut morphology of African catfish. Five isonitrogenous (32 % crude protein) diets were prepared with FSP by replacing 0 % FSP (D1), 25 % FSP (D2), 50 % FSP (D3), 75 % FSP (D4) and 100 % FSP (D5) of FM component of the diets. The results showed a significant difference (p < 0.05) in growth parameters where the fish fed D3 diet showed the highest weight gain, specific growth rate, and condition factor compared with other diets. The mean values of Red Blood Cell (RBC) and Lymphocytosis (LYM) were significantly highest (p < 0.05) in fish fed the D3 diet. The albumin (ALB), globulin (GLOB), and …