Instead of eating inexpensive and plentiful local fish in season, many Japanese go for trendy, expensive fish like tuna and salmon that have caused international outcries about overfishing.

许多日本人都欢吃时髦昂贵的金鱼和三文鱼之类的鱼，而不是食用廉价、高产的本地时令鱼，这往往会引起国际上对日本过量捕鱼的强烈抗议。

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Meat and fish are relatively expensive.

肉和鱼相对较贵。

《柯林斯英汉双解大词典》

An incredibly expensive delicacy in Japan, the pufferfish has been praised as the most delicious of all fish.

河豚在日本是非常昂贵的珍馐，它被誉为最美味的鱼。

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Fresh fruits and vegetables, lean meats and fish are expensive.

VOA: standard.2010.07.02

On a large scale, cheap fish is being substituted for expensive fish without the consumer knowing.

BBC: Mislabelled fish slip into Europe's menus

Pity the thousands of expensive tropical fish who died along the way as a Singapore family tried to figure out fish-farming.

FORBES: Magazine Article

Back in December I wrote here about the widespread substitution of cheaper species of fish for more expensive and desirable ones, a daily bait and switch that routinely goes on at retail fish markets, in restaurants and especially in sushi places.

FORBES: Fake Fish On Shelves And Restaurant Tables Across USA, New Study Says