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.

If there were an Academy Awards-style "In Memoriam segment" for all the discontinued fast food items that still have cult followings, Burger King's forgotten offerings would take up a good chunk of ...