Filet-O-Fish

The Filet-O-Fish is a fish sandwich sold by McDonald's since 1963, due to the Catholic practice of not eating meat on Fridays. It contains a breaded fish patty made from Pollock or Hoki, half a slice of American cheese and tartar sauce. It has become popular with people who cannot eat the other meaty burgers on offer, particularly Muslims who cannot eat non Halal meat.

In many countries outside the United States, UK and Canada, it is called a FishMac or a McFish.

In some areas of the U.S. (And possibly other countries) around the time of Lent, there is a "2 for $3" deal and even a "Double Filet-O-Fish" sandwich. In 2006, a viral website was launched in support of the Filet-O-Fish sandwich at http://www.filetofish.com .