just curious, what kind of fish is used in a McDonalds fish sandwich?

It's just Alaskan Pollack. Its cheap, and is of no lesser quality than the usual whitefish in fish sticks, or any other common fish

sandwhich or product.

I wanted halibut originally," Groen said. "I was paying $2 a pound for halibut. That sandwich cost me 30 cents apiece to make. They told me it had to sell for 25 cents. I had to fall back on Atlantic cod, a whitefish, and I added a slice of cheese. But my halibut sandwich far outshines that one

I am guessing that their fish is a combination of several things because it is a processed product. There isn't one naturally occurring thing in nature at McDonald's.

A square fish.

Several of the cheaper fish, primarily it is minced cod.

Whatever they can grab and mash - including cans, newspapers, and the slave driven children whom are too tired to work for there 2 cents a day.

Carp (which, in case you haven't noticed, if you change a few letters around spells CRAP). A bit of humor.

Actually, I think it's pollack (similar to cod, but cheaper).

Pollock.

its those little square fish

Great question, I never thought of this question.I don't know what it is, i just eat whatever they made.