This study aims to determine the antibacterial activity of the ethanol extract of binahong leaves in inhibiting the growth of Aeromonas salmonicida, Edwardsiella tarda and Edwardsiella ictaluri bacteria and to determine the best extract concentration to inhibit Aeromonas salmonicida, Edwardsiella tarda and Edwardsiella ictaluri bacteria. The materials used in this study were Binahong leaves, Ae…