Figure 4A: Section of Carassius auratus L. head kidney of group 4 (fasted group) showing severe congestion (arrow) and hemorrhage (arrow head) within the renal parenchyma. Figure 4B: Higher magnification of fig A showing severe congestion (arrow) and sever extravasated RBCs (arrow heads) within the renal parenchyma. Figure 4C and 4D: Section of Carassius auratus L. head kidney of group 4 (fasted group) showing sever hemorrhage with numerous lymphocytes within the renal parenchyma (arrow). Figure 4E, 4F: Section of Carassius auratus L. head kidney of group 4 (fasted group) showing mild degenerative changes in the renal corpuscles with loss of their normal architecture. Figure 4G, 4H: Section of Carassius auratus L. head kidney of group 4 (fasted group) showing sever tubular vacuolations in fig G and sever necrosis & degenerative changes in the renal tubules with loss of their normal architecture in fig H. Figure 4 I: Section of Carassius auratus L. head kidney of group 4 (fasted group) showing sever hyaline degenerative changes in the renal tubules (arrow).