Stress in fish can significantly affect their growth, behavior, and overall health. Stressors such as poor water quality, high stocking density, temperature fluctuations, or handling can lead to compromised immune function, making fish more susceptible to diseases. Prolonged stress can also reduce reproductive success and feed efficiency. It is important to recognize the signs of stress in aquaculture systems, such as abnormal swimming behavior or reduced feeding. Addressing stress involves improving environmental conditions, such as optimizing water quality and providing appropriate shelter, to promote fish welfare and maintain productivity.