The Aeromonas species of gram negative bacteria is a motile, pathogenic species which is generally seen in the various bacterial diseased fishes that are known to host various fresh and brackish water fish species that are generally seen in abundance globally and are generally found in cold to temperate zone regions and seen to be cultured in the warm water fish. The content of interest in this study is to analyze the inhibitory properties of the phytochemical extract of the Allium sativum against the Aeromonas species of diseased host fish Labeo rohita. Extracts of above that are sensitive to Aeromonas are taken and minimum inhibitory concentrations (MIC) of the extracts were added and analyzed by various qualitative methods. The results and data can then be analyzed statistically using ANOVA and the phytochemical screening shall be done using the standard procedures of estimation. Extracts of aforementioned phytochemicals are seen to possess the potential as therapy against Aeromonas which causes Aeromoniasis of Rohu that are having an opportunistic and global status and whose cure and inhibitory effect by the plants natural defense system over Aeromonas shall show a great advantage for various aqua culturists in better progress and production in its part as Rohu being a freshwater fish is a food for many. In this assessment, the vital organic functions of Allium sativum L.  are briefly highlighted with supportive working mechanisms. Further, the mechanism is then discussed how it is seen to be applicable on the treatment of Aeromonas causal diseases of Labeo rohita.