Effect of tea leaf extract on histological structure of fish gill induced with Cypermethrin. A normal histological structure of gill. B shows severe adhesion (thick arrow), severe necrosis (thin arrow), severe inflammation (star), and severe degeneration (arrowhead) in gill lamellar epithelium after treatment with cypermethrin. C shows effect of 50 mg of TLE on CMN exposure, severe degeneration (arrowhead), mild necrosis (thin arrow), and moderate adhesion (thick arrow) in gill lamellar epithelium is visible. D shows effect of 50 mg of TLE on CMN exposure, moderate degeneration (arrowhead) and mild adhesion (thick arrow) in gill lamellar epithelium is visible, H and E, Bar: 50 µm.