Bringing you Premium Quality Seafood since 1902 King Oscar Royal Fillets Skinless and Boneless Mackerel are sustainably wild-caught in the clean and ice-cold waters of the Northeast Atlantic Ocean between Norway and the Faroe Islands using ocean-friendly fishing methods. We use only North Atlantic scomber scrombus mackerel, delivering a milder taste, better texture, and juicier, more tender fillets than other varieties.