Channel catfish farming is the largest US aquaculture industry. Understanding welfare challenges in pond systems helps consumers and producers make better choices.
Farmed catfish welfare is shaped primarily by pond water quality management and disease prevention. Low dissolved oxygen events, common in summer when warm water holds less oxygen and algal blooms consume it at night, cause mass mortality events involving acute suffocation distress - catfish gasping at the surface and dying over hours. These events represent both welfare crises and production losses that better management can prevent. Seine harvesting creates extreme crowding and handling stress that causes significant short-term physiological distress. Disease events from columnaris and other pathogens cause tissue damage, immune system stress, and prolonged illness in affected fish. The relative humaneness of electrical stunning for slaughter is a welfare positive, but the production period welfare challenges are significant.