Protective Effects of Sanyar Prebiotic on Immunity and Tissue Changes of Common Carp (Cyprinus carpio) Exposed to CuSO₄ Stress

Figure 3

Tissue section prepared from fish kidney exposed to copper sulfate (H&E, bar = 40 μm, ×400). B1: control treatment fed basal diet and arrowheads: normal renal tubules (a) and accumulation of melanoma macrophages (b). B3: P2 treatment fed with Sanyar supplement and arrowheads: normal renal tubules (a), accumulation of melanoma macrophages (b), and destruction of renal tubules (c).