Hybrid striped bass are widely farmed in the US for their flavor and hardiness, with welfare considerations arising from their semi-anadromous biology and predatory nature.
Hybrid striped bass welfare in aquaculture is shaped by their active, predatory nature and sensitivity to environmental conditions. Summer oxygen depletion in warm-water ponds causes mass hypoxic stress events where fish surface-breathe in acute distress — a welfare emergency common in summer months. Proliferative Gill Disease — caused by a myxozoan parasite — damages gill tissue, impairing respiration and causing chronic respiratory compromise similar to breathing through damaged lungs. Seine harvesting concentrates fish into severely crowded, oxygen-depleted conditions before removal. High stocking densities suppress growth and social hierarchy formation. Transition to recirculation aquaculture systems (RAS) allows better oxygen and temperature control but requires significant capital investment. Improving welfare requires better aeration systems, disease prevention protocols, and more humane harvest methods.