The Filet-O-Fish is a fish sandwich served at McDonald's.It is sometimes called the FishMac or McFish in non-English speaking countries.The sandwich is a breaded and fried whitefish filet topped with pickled relish,half a slice of cheese,and tartar sauce,all on a toasted bun.
There was a commercial where a talking fish would sing"Give me back that Filet-O-Fish,give me that fish!Give me back that Filet-O-Fish,give me that fish!What if it were you hanging up on this wall?If it were you in that sandwich,you wouldn't be laughing at all!"
Captain Crook, the McDonaldland character, was previously used to market the sandwich to children.
The Filet-O-Fish is typically available systemwide year round but was originally developed to serve Roman Catholic populations during Lent. It is also a popular McDonald's menu item with Muslims because, unlike meat, fish is always considered Halal.