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Objective:To evaluate the antibacterial activity ofHalophila stipulacea (H. stipulacea), Cymodocea serrulata (C. serrulata) andHalodule pinifolia (H. pinifolia) against seven human bacterial pathogens.Methods:The antibacterial activities of the extracts on the various test organisms using disc diffusion method and Minimum Inhibitory Concentraction(MIC).Results:Methanol and chloroform extracts of all the three seagrasses were active against all the tested pathogens, whereas the hexane extract of seagrasses was not active againstStaphylococcus aureus (S. aureus). Antibacterial activity of three seagrass screened, was in the order ofH. pinifolia >H. stipulacea>C. serrulata.Conclusions: This antibacterial studies can further investigated on seagrasses for purification of bioactive substance and its possible utility in disease control.