Globally, aquaculture is the largest and fastest-growing business that produces animal food. Over the past ten years, there has been a minor global decline in fish production, but there has also been a rise in consumer demand for fish products. However, a number of problems are causing this fastest-growing aquaculture sector to lag behind; one of the most significant of these is the prevalence of infectious illnesses, which are crucial to the development of sustainable aquaculture. Historically, the aquaculture system has employed a variety of chemotherapeutic, antimicrobial, or antibiotic medications as treatments or preventative measures to avoid this. However, the application of synthetic chemicals or chemotherapeutics is an extremely expensive operation that has a negative influence on the aquaculture ecology in addition to the industry's socioeconomic losses. In order to produce non-antibiotic, chemical-free, drug-resistant, and environmentally friendly aquaculture, it is imperative to identify the appropriate substitution approach. Probiotics are therefore an alternative to antibiotics and can be used to cure or prevent infectious diseases, improve the microbial balance in aquatic environments, stimulate growth, and strengthen the immune system. Also, it maintains the equilibrium of microorganisms in the gut, minimizing the adherence and colonization of pathogens at various stages, including larval, fry, and juvenile. Probiotics are one method, nevertheless, of fostering and advancing sustainable aquaculture. Probiotics are a useful tool in aquaculture systems, but more research is needed to determine how effectively they work to generate environmentally friendly products and sustainable aquaculture.