The McDonald's Filet-O-Fish, the only fish-based item available on the menu, has seen a sharp increase in its price since 1991. The sandwich, which was introduced in 1962 to fill a gap left for customers who abstained from meat during Lent, now costs around $5 per person. However, the price has since dropped to $1.29. Despite this, fans have noticed that the sandwich appears to have shrunk in size despite price increases. This could also be attributed to the change in fish used in the sandwich. For those with the app, there are many promotions available.