Fonseca, FilomenaFuentes, Juan2023-11-072023-11-072023http://hdl.handle.net/10400.1/20135The importance of the microbiome in aquaculture species is widely acknowledged. The fish gut microbiota is essential for host fitness, modulated by diet and environment, and affects animal physiology. The gut microbiome optimizes nutrient uptake and immunomodulation and enhances host resilience against infectious diseases. Understanding microbiome dynamics in aquaculture species is vital in promoting animal health and industry sustainability. In this Research Topic of Frontiers four original papers and one review paper were accepted. This editorial provides an integrated summary of those papers’ main discoveries and clues.engMicrobiome dynamicsBiomarkersWelfare statusAquatic speciesAquaculture probioticsjournal article10.3389/fphys.2023.12763511664-042X