Probiotics may provide an alternative way to reduce the use of antibiotics in aquaculture and simultaneously may avoid the development of antibiotics resistant bacteria. Most probiotics proposed as biological control agents in aquaculture belong to the lactic acid bacteria (LAB).
Probiotic bacteria in aquaculture are now primarly used to improve water quality by balancing bacterial population in water and reducing pathogenic bacterial load.
Although the beneficial effects of probiotics in human, pig, cattle and poultry nutrition has been well documented, the use of such probiotics in aquaculture is a relatively new concept. However, the number of research is increasing to better select probiotic strains for application in aquaculture.