Antibacterial activity of Indonesian red algae against bacterial fish pathogens and characterization of active fractions.

In this study the crude ethyl acetate extracts and fractions from red algae were studied against fish pathogens. was extracted with ethyl acetate, fractionated in silica gel coloum chromatography and gradient hexane-ethyl acetate. The extract and fractions were subjected for bioassay guided isolation against fish pathogen spp and .