Effect of different concentration of cypermethrin on various histological structure of Kidney of Schizothorax esocinus. (A) Control showing histology of kidney with normal glomerulus, tubules and interstitial tissues. (B) fish exposed to 1 ppm showing (V) Vacuolation and (IH) Interstitial hemorrhage. (C) fish exposed to 2 ppm showing (HMM) Hyperactivated MM and (V) Vacuolation. (D) fish exposed to 3 ppm showing (IH) Interstitial hemorrhage. (E) fish exposed to 4 ppm showing (IH) Interstitial hemorrhage, (GM) Multifocal granulomas and (HMM) Hyperactivated MM.