We've had alot of news stories about that here also...
A regional favorite lakefish here is Walleye (type of perch I think?). I can't remember what they are replacing it with that is cheaper, but I think one of them was flown in from Japan or somewhere else across an ocean! That is neither local OR fresh!
OK I did an investigation. Walleye is a pike, they are replacing it with Zander which comes from Eastern Europe. (Still not local)