ABSTRACT Streptococcus agalactia is a bacterium that causes streptococcosis which attacks tilapia.This research was conducted in March - June 2022 at the Laboratory of Parasites and Fish Diseases, Faculty of Fisheries and Marine, University of Riau. This study aims to understand the best dose of Kaempferia galanga and Curcuma zanthorrhiza fermented which are added to the feed to increase the Or…