John Dory
You may notice this name from episodes of Hell's Kitchen.

An odd-looking fish found in European seas, the John Dory has a huge, spiny head and long, flat body. The fish's flesh is mildly delicate, and it can be grilled, sauteed, or poached. It's rarely imported into the US, which explains why Ramsay would like to have it on his American restaurants' menus.

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