Assessing the quality of organic and conventionally-farmed European sea bass (Dicentrarchus labrax)

► We compared organic and conventional sea bass at two commercial sizes. ► Organic and conventional fish had similar physical traits. ► Organic sea bass showed a higher n − 3 to n − 6 PUFAs ratio. ► The size affected biometric traits and chemical composition of sea bass. ► NIRS analysis classified the fish according to the production system and size.