Hybrid striped bass aquaculture is a growing US industry. Understanding the welfare needs of this active, schooling predator guides better management practices for commercial production.
Hybrid striped bass welfare in recirculating aquaculture systems is shaped by the tension between the high stocking densities that make RAS economically viable and the density limits that welfare science suggests. These are athletic, territorial predators whose natural behavior includes active swimming and prey pursuit — behaviors poorly accommodated by crowded tank conditions. Chronic stress from overcrowding suppresses immune function, making disease more likely and requiring more antibiotic intervention. The welfare-economics alignment is clear in this context: welfare-appropriate stocking densities produce healthier fish with better growth rates and reduced disease treatment costs. The challenge is convincing producers that the upfront investment in larger tank systems pays welfare and production dividends over time.