One of the diseases that most often attacks freshwater fish is Motile Aeromonas Septicemia. It caused by Aeromonas hydrophila bacteria. Peronema canescens is an original Indonesian plant that has potential as an antibacterial. The aims of this study was to determine the best concentration of Peronema canescens leaf extract in treating nile tilapia infected with bacteria A. hydrophila. The exper…