Innate immunity enzyme activities in the haemolymph of Litopenaeus vannamei fed diets with increasing replacement of fish meal with mealworm. Data are expressed as the mean of triplication of each group ± SD (n = 3). Significant differences (P < 0.05) are marked with different letters. SOD, superoxide dismutase; PO, phenoloxidase; LZM, lysozyme; ALP, alkaline phosphatase; ACP, acid phosphatase; THC, total haemocyte count. T0 = diet without mealworm (MW) inclusion; T15, T30, T60, and T100 = 15, 30, 60, and 100% replacement level of FM with MW, respectively.