no, really. tuna is as low as 5 dollars a pound. halibut is 20. obviously you're just being a tard about the corpses. why the fuck would any restaurant, especially a restaurant chain that's mostly locally operated, be sourcing corpses instead of tuna? it does not make sense at all. it does not make sense to replace tuna with another fish. they're not offering you bluefin, they're offering you starkist from a can, the same as you can buy from the grocery store on a pallet.
it's the lowest quality garbage tuna on the planet, but it's retarded to say it's not tuna because someone took COOKED FOOD and had another person analyze it for DNA that gets cooked out. heat-damaged DNA is even being 'studied' as a cause of cancer in people. it's known that if you cook food, you damage or even destroy the DNA in it. this was non-scientific from the start, and is purely a stunt.
you seem like the kind of person who doesn't know to watch out for all the dihydrogen monoxide to watch out for in their food.