In recent years it was discovered that Sushi restaurants were substituting Tilapia for Red Snapper and not saying anything. The Tilapia is cheaper and more available. If some suspicious persons hadn't decided to do DNA testing we might never have known. Who knows, in 30 or 40 years we might all be thinking that Tilapia WAS Red Snapper. This kind of thing happens everywhere with all things.
Of course, as it happens, i prefer Tilapia.
