Which sandwich is a classic lunch item at Jack in the Box?

The Fish Sandwich is recognized as a classic lunch item at Jack in the Box because it is a staple in their menu that offers a seafood option that caters to those looking for an alternative to the traditional beef or chicken sandwiches. This sandwich typically features a crispy fish fillet, lettuce, and tartar sauce, embodying the essence of casual lunch dining. Its popularity stems from both the flavor and the variety it adds to the menu, appealing to customers who enjoy fish-based meals. The other options, while they may be available, do not have the same traditional status in the context of Jack in the Box's lunchtime offerings.