This research aimed to evaluate the potential of marine photosynthetic bacteria (MPB) and their biopigment extracts as antimicrobial agents against two major aquatic pathogens, namely Aeromonas hydrophila and Staphylococcus aureus. Six MPB isolates were cultured and incubated to produce biopigments. Biopigments are natural pigments from microorganisms that may have antimicrobial and antioxidant…