Effects of Coconut Oil (Cocos nucifera L.) on Aeromonas hydrophila Infection, Immune Protein Profile, and Mortality in Zebrafish (Danio rerio)

Coconut oil lacks direct bactericidal activity against <i>A. hydrophila</i> but enhances host resistance by stabilizing gut microbiota and promoting the expression of defensive proteins such as HSP90 and EGF-like molecules. These findings highlight the potential of coconut oil as a non-antibiotic functional feed additive for sustainable aquaculture. Further large-scale and long-term studies are warranted to validate its efficacy.