We shall introduce the different notions of quality, applied to aquatic food products, and the procedures and services set up by public administration and economic operators, in order to regulate and/or validate the various forms of quality. A comparison between the case of fisheries products, and the case of farmed products, will be presented. The approach of quality for aquaculture products is today in a dynamic phase, integrating the notions already known in agri-food business, and in the group of aquatic food products. We shall introduce the main approaches used to create various segments of quality levels in a foodstuffs market, through national or European regulatory systems (PDO, PGI, certification, labelling) and through branding, and their applicability to aquatic farmed products. Specific questions arise for this family of products being at the cross-roads between two groups: aquatic food products like fisheries products, farmed products like agricultural products.