Method for controlling fish pathogenic bacteria of phylum bacteroidota

Abstract

Provided is new predatory bacteria for controlling fish disease caused by bacteria of the phylum Bacteroidota, especially fish pathogenic bacteria of the genus Flavobacterium.　The present invention relates to: a method for controlling fish pathogenic bacteria in the phylum Bacteroidota present in fish or fish habitats, wherein the method is characterized in that predatory bacteria or variants thereof that prey upon the fish pathogenic bacteria are applied to the fish or fish habitats; predatory bacteria or variants thereof that prey upon fish bathogenic bacteria of the phylum Bacteroidota; and a composition containing the predatory bacteria or variants thereof.