This study aims to determine the antibacterial activity of the ethanol extract of Binahong leaves in inhibiting the growth of Aeromonas hydrophila, Pseudomonas aeruginosa, and Vibrio alginolyticus bacteria and to determine the best extract concentration to inhibit Aeromonas hydrophila, Pseudomonas aeruginosa and Vibrio alginolyticus bacteria. The materials used in this study were Binahong leave…