You almost certainly have never eaten the eel you think you ate. Before it is unagi over rice or angulas in a clay dish, the eel reaches the coast as a splinter of glass, a transparent thread a few centimeters long with barely an eye to it, drifting in from the open ocean on currents it does not choose and traveling thousands of miles to get there. It arrives, in a sense, blank. And almost everything that happens to it after is a matter of one thing being sold as another. Eel is the fish of disguise.

Start with the farm, because there has never been one. Up until a laboratory in Japan closed the cycle for the first time this past May, no one had ever bred an eel in captivity from egg to egg. The European eel spawns somewhere in the Sargasso Sea, a patch of the mid-Atlantic no one has ever actually watched it use, and it drifts back toward Europe on the Gulf Stream over a year or more, going to glass as it reaches fresh water, then yellow as it climbs the rivers, living years or decades before turning silver and swimming back across the ocean to spawn once and die. What the trade calls farmed eel is simply glass eels netted from that journey and then fattened in tanks. The farm was always just a slower kind of fishing wearing a farm name.

That fiction matters now because the animal is vanishing. The European eel has fallen more than ninety percent since the 1970s, it is listed critically endangered, sits on Appendix II of the CITES treaty, and has been banned from export out of the European Union since 2010. None of this has stopped the trade. Europol puts the illegal glass-eel traffic at up to three billion euros in a peak year, one of the most lucrative wildlife crimes on earth, and in 2023 alone European authorities seized more than a million live eels. They move from a few Atlantic rivers, Portugal allows the catch only on the Minho, where the records get inflated to launder eels taken elsewhere, out to farms in China, Taiwan and Japan, where a critically endangered European fish is raised, grilled, and sold to you as Japanese unagi, even though Japan's own eel is endangered and its farms run on the same wild-caught glass. The eel on the Tokyo plate is very often not Japanese at all.

The disguise runs the other way at the luxury end. In the Basque country the glass eels themselves, angulas, are the caviar of the north, eaten at Christmas and on the feast of San Sebastián, they can run to five hundred dollars per pound. A fish once so common that it was fed to pigs is now guarded like a jewel. So dear, in fact, that in 1991 a Spanish company invented gulas, little threads of pollock surimi pressed and striped to look the part, so the tradition could survive without the hefty bill. Most of the baby eels in most of the Christmas dishes in Spain today are pollock doing an impression of an eel.

Which is the long way around to the eel in this week's tin, and to why it is the honest one. It is not Anguilla. The everyday canned eel of Taiwan and much of Asia is conger, a different family altogether, abundant and unthreatened, roasted and sealed in a sweet, spiced sauce and eaten over rice for a couple of dollars. It does not pretend to be a rarer fish, or a legal one, or a Japanese one, or a fish at all when it is really pollock. It is exactly what the label says: cheap, plain, and in no trouble. In a fish defined end to end by one thing standing in for another, the five-dollar tin is the only eel telling the truth.

The eel Taiwan actually eats.

While Europe fights over glass eels worth five hundred dollars a pound, Taiwan has been quietly eating a different eel for generations. Old Fisherman, made by Tong Yeng, is roughly what canned tuna is to America: a pantry fixture, not a delicacy. This is a genuinely beloved everyday food, not a novelty.

The eel inside is conger, the abundant and unthreatened cousin of the endangered Anguilla, roasted and packed in a dark, sweet sauce of soy and sugar with cinnamon, pepper, and enough chili for a low, warming burn. The flesh comes out soft and a little crumbly, closer to pork floss than to a fillet, and the sauce gives it a deep savory weight. It is rich and salty and built to be eaten with something plain.

You can eat it straight from the can at room temperature, and plenty of people do, but it becomes a real meal when warmed and spooned over hot white rice, or stirred through a bowl of morning congee where the crumbly meat belongs.

It is the argument of this week's essay sitting in a can. In a fish the rest of the world has priced into crisis and wrapped in disguises, here is the eel that is cheap, honest, in no trouble, and genuinely loved, for the price of a coffee.

$5.00 at RTG.fish.