[wfunction]

> To me, the idea of eating something potentially mercury-toxic like tuna or swordfish when expecting something like salmon is pretty terrifying.

Yes, that's why I very clearly said

> not everyone cares exactly what the species is

And was anyone substituting salmon with tuna in the first place? It's not like every wild substitution is being made. Like I said, the FDA is fine with some of them. Your viewpoint is just fine (and I'm with you honestly) but my point is that a lot of other people have others.