Sea bream (Sparus aurata) is one of the most important farmed fish species in Mediterranean Europe. Understanding welfare challenges in sea bream aquaculture guides better practices and certification standards.
Sea bream welfare in Mediterranean aquaculture presents challenges characteristic of intensive marine fish farming. Cataract prevalence — essentially universal in many farms — reveals a nutritional management failure with direct welfare consequences: affected fish have impaired vision that reduces their ability to feed effectively, avoid predation, and navigate their environment. The condition is largely preventable through dietary tryptophan supplementation. Stocking density management is another critical welfare variable: sea bream are naturally schooling but show aggressive hierarchical behavior at high densities that causes fin damage and feeding competition. The welfare profile of certified organic sea bream, while better than conventional production on density and treatment criteria, still falls short of what behavioral science indicates these fish need for optimal welfare.