So when I go to the market and get "Wild Caught Salmon" it really could be farm raised salmon that escaped and were subsequently fished in the vicinity?
So if you want wild salmon, start by looking for a Pacific label, a listed species, or a regional designation of some kind. That's still not a guarantee, but it narrows things down quite a bit.
For what it's worth, 90% of all salmon on the US market is farmed. So if you're at a restaurant or a BBQ and aren't sure what you're getting, you're probably getting farm-raised Atlantic salmon.
But yes, shady fish distributors have been caught selling cheaper fish as the more expensive.
Another fact, the only native Trout species in my state, Georgia, is Brook trout. They are actually closer to Arctic Char than trout or salmon.
At least they have to label it as color added now...