The contribution analysis showed that the diet process contributed to the majority of the impacts. The sea bass rearing stage was the main contributor of eutrophication (more than 58% in TR and 52% in CR). The analysis revealed that the major part of the energy consumption was due to rearing phase through water pumping and oxygen injection and production, with 175,000 MJ/tonne and 280,000 MJ/tonne, for TR and CR, respectively.