The Filet-O-Fish isn't the only fish sandwich game in town. In decades past, another popular fast food giant introduced a fish sandwich of its own.
Despite numerous rebrands, and partly due to environmental activism, Burger King's much-loved sandwich was eventually replaced by a more conventional offering.
When McDonald's attempted to tug at customers' heartstrings by using a young boy's sad loss to sell Filet-O-Fish sandwiches, critics found it in poor taste.