Atlantic and Pacific bluefin tuna populations have been severely depleted by decades of overfishing driven by luxury sushi markets, raising both conservation and individual welfare concerns.
Whether bluefin tuna experience suffering in a morally significant sense is uncertain, but emerging research on fish cognition and nociception suggests meaningful capacity for pain. Net capture causes acute crowding stress as thousands of fish are compressed together. Purse seine captures may leave fish in nets for extended periods before slaughter. The ecological welfare consequences of bluefin population collapse — disrupting ocean food webs that support countless other species — extend far beyond individual tuna. Consumer choices around high-value sushi species directly influence the economics of overfishing.