Commercial fish sausages were produced from fillets of crimson snapper (Lutjanus erythropterus), a demersal fish species, with 1.35% sodium sulphite (E 221) as an antimicrobial agent. No spices or other ingredients were included in the formulation. The sausages were produced in a local supermarket, Oman, and packed in sausage casings. A total of 5 kg of fresh sausages were purchased immediately after processing and brought to the laboratory within 30 min.