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The common octopus (Octopus vulgaris) is the most studied of all octopus species. Its range in the eastern Atlantic extends from the Mediterranean Sea and the southern coast of England to at least Senegal in Africa. It also occurs off the Azores, Canary Islands, and Cape Verde Islands. The species is also common in the Western Atlantic.

The turbot (Scophthalmus maximus) is a species of flatfish in the family Scophthalmidae. It is a demersal fish native to marine or brackish waters of the North Atlantic, Baltic Sea and the Mediterranean Sea.

The common ling or simply the ling, Molva molva, is a large member of a family of cod-like fishes. An ocean fish whose habitat is in the Atlantic region and can be found around Iceland, Faroe Islands, British Isles, the Norse coast and occasionally around Newfoundland, the ling has a long slender body that can reach 2 metres in length; in adulthood, it is generally a deep-running fish, spending much of its life at depths of 100 m or more; younger fish are found at shallower depths. The ling is edible; its flesh is prized and can be considered interchangeable with cod in either its fresh, salted or dried forms. The salted roe of the ling is considered a delicacy in Spain and is known as huevas de maruca. The lutefisk – ling that is first dried, then soaked in water and then steeped in a lye of soda and slaked lime – is a traditional dish at the Christmas table in Sweden, Norway and Finland.