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This study investigates the physiological and microbial impacts
of nanobubble (NB) oxygen supersaturation on the gut microbiome
composition and growth performance of Barramundi (Lates calcarifer),
a key tropical aquaculture species.
A 90-day controlled experiment was conducted comparing conventional
aeration systems with nanobubbleenriched tanks under identical feeding
and environmental conditions. Results demonstrated a significant improvement
in feed conversion ratio (FCR), specific growth rate (SGR), and oxygen
utilization efficiency in nanobubble treatments. Highthroughput 16S rRNA
sequencing revealed enhanced microbial diversity and enrichment of
probiotic genera (Lactobacillus, Bacillus, Cetobacterium), indicating
improved gut health and nutrient absorption
Nanobubble oxygen supersaturation significantly improves
growth performance, gut microbial diversity, and physiological health
of Barramundi. The optimized DO conditions enhance feed efficiency,
stimulate beneficial gut bacteria, and maintain redox homeostasis
without inducing oxidative stress. These results demonstrate that
nanobubble technology can serve as a transformative bioengineering
solution for sustainable, zero-discharge aquaculture systems.
Its integration into tropical fish farming could redefine water management and
microbial optimization, ensuring both ecological and economic benefits
