Fish health in aquaculture is profoundly influenced by environmental quality. Unlike large water bodies, smaller aquaculture systems like ponds and tanks often experience variable conditions that can stress fish. Key stressors include high stocking densities, frequent handling, and fluctuating water parameters. As aquaculture intensifies, increased fertilization and feeding practices exacerbate these stressors, degrading water and soil quality. This deterioration impairs fish’s immune systems, making them more susceptible to diseases. The health of fish is intricately linked to their environment, with stress factors classified into physical, chemical, and biological categories. Physical stressors, such as temperature extremes and overcrowding, directly impact fish health and stress responses. Chemical stressors, including fluctuations in pH, dissolved oxygen, and carbon dioxide levels, further complicate the health dynamics. Biological stressors, such as pathogens and parasites, exploit weakened immune systems, leading to disease outbreaks. Understanding these interactions is crucial for improving aquaculture practices and ensuring optimal fish health. As aquaculture practices evolve, balancing productivity with environmental management is essential to mitigate stress and enhance fish welfare.