http://www.npr.org/blogs/thesalt/2014/07/01/327248504/the-great-fish-swap-how-america-is-downgrading-its-seafood-supply
On why the U.S. exports the best-quality fish
We only eat about 15 pounds of seafood per year per capita. That's half of the global average, so there's that. The other thing is that other countries really are hip to seafood. The Chinese love seafood; the Japanese, the Koreans they love seafood. They're willing to pay top dollar for it. We just aren't willing to do so. We want our food cheap and easy.
All of this fast-food commodification of seafood protein because that's kind of what it is at this point adds to that general preference for cheap stuff. Kind of in tandem and in league with that is the American tendency to avoid taste. ... Foodies [talk] about flavor and texture and the food movement and that kind of thing, and that's true of about 5 percent of Americans, but 95 percent of Americans really are not so into flavor. ... If we don't like the flavorsome fish like bluefish, mackerel, things like oysters, things that really taste of the sea if we don't like that, then we're going to go for these generic, homogenized, industrialized products
(snip)
A certain amount of Alaska salmon gets caught by Americans in Alaska, sent to China, defrosted, filleted, boned, refrozen and sent back to us. How's that for food miles? We don't want to pay the labor involved in boning fish and more and more of that fish that used to go make that round trip is actually staying in China because the Chinese are realizing how good it is, much to our detriment.
The labor is so much cheaper that it makes the shipping cost-effective. When you ship things via freighter, frozen, the cost per mile is relatively low compared to, say, air freighting or train travel or truck freighting.
I like Salmon as well.