Background Temperature is a key factor affecting the survival of farmed fish. With global warming, high-temperature stress triggers a stress response that leads to the destruction of the fish intestinal microbiota structure. This in turn affects fish intestinal health and reduces their immune resistance to disease. Probiotics are widely used in aquaculture and play an important role in promoting the growth and immunity of farmed fish. They also show certain potential in alleviating the impact of high-temperature stress on farmed fish.

Progress This paper describes the effects of high temperature on the physiological metabolism, immune function, feeding behavior and reproductive development of cultured fish, summarizes the common types and preparations of probiotics, their application scopes and effects, and their role in alleviating the high-temperature stress of cultured fish, and summarizes the action pathways and mechanisms of probiotics on cultured fish, aiming to provide reference for the subsequent application and related research of probiotics.

Conclusion Probiotics exhibit a beneficial impact on mitigating high-temperature stress in aquacultured fish by alleviating stress, enhancing disease resistance, and optimizing the gut microbiota composition.

Prospect In the future, further exploration can be undertaken focusing on the screening of host-specific probiotics, investigating the effects of stress regulation, and exploring the functional transformation of probiotics. This will aim to provide robust support for the application of probiotics in aquaculture practices.