That's true enough, Atlantic salmon is farmed fish, but that's actually the case for all fish labeled organic. The USDA does not have standards for labeling wild fish as "organic" in part because conservation and food advocates have asked them not to.
'Chef Diane Morgan is the author of "Salmon: A Cookbook." She says she's noticed a bit of bait-and-switch at high-end restaurants lately.
Diane Morgan: You'll see Scottish organic salmon and so people are drawn to that like, "Oh, I like to eat organic." It doesn't say on the menu that it's farmed. If you know enough about this industry, you know that any salmon coming out of the Atlantic is farmed.'
Why? Because the organic label originates in the world of farming, where standards are based on the control of inputs: fertilizers, pesticides, colorants, etc. Wild fish swim where they want and eat what they want. You can test fish for contaminants, but you can't prevent them from snapping up tasty, mercury-filled plankton. Labelling wild fish organic is like having free-range peanut butter -- the label's irrelevant to the conservation question at hand.
There's an aquaculture working group at USDA looking at the thorny questions of "organic" fish -- what kind of feed they should eat, what kind of pens. For now, if you see organic, you're looking at a farmed fish.