ABSTRACT This research was held on December 2020 – February 2021 at the Laboratory of Fish Parasites and Diseases, Faculty of Fisheries and Marine Science, University of Riau. The purpose of this study was to analyze the best dose of cherry leaf solution (Muntingia calabura L.) to prevent Motile Aeromonas Septicemia from total erythrocytes, hematocrit and hemoglobin levels of jambal siam (Pa…