“…As widely recognized by the United Nations’ 2030 Agenda for Sustainable Development and FAO, fishery and aquaculture have an essential role for food security and nutrition [ 2 ]. About 70% of fish and seafood is processed before sale, thus producing a huge amount of solid waste deriving from activities such as beheading, de-shelling, degutting, removal of fin and scales, filleting [ 3 ], [ 4 , 5 ]. The fish industry by-products generally consist of viscera, muscle tissues, carcasses, heads, fins, skin, scales and bones, being approximately between 50% and 75% of the fresh weight depending on the species [ 6 , 7 , 8 , 9 , 10 , 11 ].…”