What specific fish species is officially used for the battered and fried fillet in the Filet-O-Fish?
Alaska Pollock
The official confirmation for the Filet-O-Fish states that the sandwich contains fillets of Alaska Pollock. This is a specific species of white fish, scientifically designated as *Gadus chalcogrammus*, widely utilized in the commercial seafood industry. This choice is made because the pollock possesses a mild flavor profile and a firm texture, attributes that allow it to withstand the required deep-frying process necessary for the sandwich preparation while maintaining structural integrity. While consumers sometimes associate fried fish sandwiches with cod, the Filet-O-Fish relies specifically on the characteristics of the pollock to ensure product consistency across its global footprint.

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Is the Filet-O-Fish Actually Fish? - YouTube