Portugal’s favorite fish does not swim in Portuguese waters. Since the 16th century, Portuguese fishermen have sailed to Newfoundland in search of gadus morhua, more commonly known as codfish. The French call the bland-tasting fresh cod “cabillaud” and the more appetizing salted cod “morue.” In Portugal this distinction is superfluous because only the salted variety is appreciated. So, one word suffices: “bacalhau.”
Since cod has very little fat, once it is cured in salt, it keeps for a long time without becoming rancid. For this reason, dried codfish was often consumed by those who lived far from the coast in days of religious abstinence from meat like Christmas Eve.