Antibacterial activity of marine microalgae extracts against pathogen of Siamese fighting fish (Betta splendens)

This study demonstrated the promising antimicrobial potential of crude extracts from marine microalgae, particularly the ethanolic extract of <i>I. galbana</i>, which showed strong activity against both terrestrial and aquatic pathogens. The findings suggest that bioactive compounds in these extracts, especially those from <i>I. galbana</i> and <i>C. calcitrans</i>, can be effective in managing bacterial infections such as <i>A. veronii</i> and <i>M. marinum</i> in betta fish. These results highlight the potential of marine microalgae as natural, sustainable alternatives for disease control in aquaculture.