The Fish Sold as Chalan Beel's, and the Proof That Isn't There — A Blockchain Question from Bogura's Morning Market

Seven in the morning. On wet ground at the Pallimangal market in Bogura Sadar Upazila, sheets of polythene are spread out with rows of rui, katla, mrigel, puti. A buyer bends down to check the gills, the eyes, running a thumb along the scales. Then comes the question that isn't really about the fish, but about its origin. "Brother, which beel?" The seller does not hesitate for even a moment. "Chalan Beel." The price rises by a few taka. The buyer pays the extra with a smile. Nobody asks for a certificate. Nobody could ask for one, because in this market there is no such thing as a certificate.

I had gone to Bogura for a different reason. A documentary was underway about families who send their children abroad — homes of sons who left for Qatar, Dubai, Malaysia, the arithmetic of money sent back, the empty beds. On my very first morning, walking into the Pallimangal market, my ear caught on a single sentence. "Chalan Beel fish." The sentence is so simple, spoken so unhesitatingly, that it needs no proof to be true — it only needs belief. And belief, however sincere, is the cheapest thing in any market.

Since that morning, one question will not let me go. Why does the price of a claim with no certificate rise so easily? And if there were a certificate, what would the market look like?

Context: Where the Beel Was, and Where Only the Name Remains

Chalan Beel is not a single pond. It is one of the largest wetlands of the Bengal delta — spread mainly across Natore, along with Pabna, Sirajganj, and reaching a little into Bogura. In the monsoon it once brimmed over a vast area, as older records note. Its distinction lies not only in size but in water. Flowing water, natural feed, an open basin — these three things separate the fish of a beel from the fish of an ordinary pond, a belief held across generations.

But the question today is how much of that belief still stands on solid ground. Decade after decade, the beel has shrunk — siltation, illegal occupation, roads and embankments, unregulated ponds and enclosures. Where the water's edge once shifted on the map again and again, much of the land is now permanent, cultivable, fenced. The smaller the beel grows, the more expensive the name "beel fish" becomes.

Here lies the birth of an economy. The price of a product comes not from its quality but from its story. To the seller, the fish has exactly one identity — which beel it came from. And there is no witness to that identity. The fish is caught in the nets of fishers at the beel. From there to the paikar, then the arat, then a truck of ice boxes, then rows laid on polythene in a market hundreds of kilometres away. With every handover, information erodes a little. In the end only a label arrives — "Chalan Beel."

Standing in the Pallimangal market, I was doing the arithmetic. How much extra a buyer pays is not the big question. The big question is: what is he buying? Fish, or a promise? And if no one is accountable behind that promise, then it is not a promise — it is a guess. A market can stand on guesses for a while. But when the guess becomes established, the honest seller is punished too, because the honest seller and the liar end up at the same price.

Core Analysis: The Ledger of Proof, and What Blockchain Actually Does

Now to the technology that has dominated talk of agricultural and food supply chains for the past few years — blockchain.

First, let us be clear about what blockchain is not. It is not magic; it is not a fish-detecting device. It is a ledger — one where every handover is added as a written entry, with a timestamp, and once added, it cannot easily be erased. If anyone tries to alter an entry, it will no longer match the other copies, and the tampering is exposed. For fish, this means every step from net to plate is recorded, and anyone can verify that record.

Is this a foreign fantasy? No. In export markets it has been mandatory for years. The European Union's regulation on illegal, unreported and unregulated fishing — known as the IUU Regulation — requires catch certificates for fish and fishery products imported into the Union. In other words, who caught the fish, where, and in what waters must be proven at the border. Bangladesh exports hundreds of millions of dollars' worth of shrimp and fish, much of it to Europe. So the very idea of traceability and chain-of-custody has already entered our export economy.

The question, then, is this: if proof is demanded at the border, why should it not be demanded in the domestic market? The buyer in Pallimangal deserves the same right. Precisely because he is paying more, his claim to verification is even stronger.

Let us break down what a blockchain-based supply chain could do.

First, it would raise the cost of lying. Today, selling fish from elsewhere under the name of Chalan Beel carries no fear of being caught. In a recorded system, that risk appears. The seller who tells the truth is rewarded by the market for his honesty — and that is the real incentive.

Second, it would make the story inside the price transparent. Where is the extra money going — to the fisher, or into the pocket of the middleman? Where the fisher stands at the margin, a lack of transparency harms not only the consumer but the producer.

Third, it would preserve memory. Which beel yields how much fish, in which month, caught by which fisher — accumulated, this data builds a picture of the beel's health. That picture is a tool not only of commerce but of conservation. If someone learns that rui catches at Chalan Beel have fallen for five straight years, that is not merely market news — it is a warning.

But here I must stop, because if I praise the technology while burying the real problem, my writing will have done nothing. In more than thirty years of writing about sport, I have seen one thing clearly: technology never creates truth; it only preserves truth. A truth that does not exist beforehand cannot be written into a ledger.

Contrarian Angle: When a Ledger Becomes a Tidy Copy of a Lie

Now the part where I want to stay honest, even if that honesty turns against my own earlier paragraph.

Blockchain's weakness is not in the technology but at the doorway. A ledger begins exactly where people are willing to enter information. If recording starts at the arat — that is, once the fish has left the beel's bank and travelled far away — then what the ledger certifies is not the truth of the beel but the word of the aratdar. To put it grandly: the middleman's statement, set in digital type. A statement is still just a statement.

And the very person who could sign the first block is the fisher — the one with no smartphone, often with no formal identity document at all, the one who moves with his family from season to season. The absence of a digital identity does not mean he is dishonest. It means the system is not prepared to accept him as a witness. And a system that does not count the producer as a witness — I have my doubts about whom it does count.

The second contrarian point is more uncomfortable. "Chalan Beel" is turning from a geographic name into a brand. And a brand becomes expensive exactly when the thing inside it becomes rare. If the beel keeps shrinking, "beel fish" will stand only as a memory. And no ledger can verify a memory. A ledger can say which enclosure the fish came from; it cannot say whether there will be fish in that beel next year. Where traceability ends, the real crisis begins.

And the third point, my greatest fear. I must not write this market as strange, chaotic, a spectacle for an outside reader. No one in this market is foolish, no one is lazy. They move intelligently within a system that offers no reward for telling the truth. I hear the market's calls as a chorus, and the price as merely its first line. Where the chorus stops, the real dialogue begins — but no one writes it down.

What a Truth Costs When It Is Sold

To me, every supply chain is a documentary in which objects perform their own origins. The moment the camera rolls, someone says: I am not from here — I came from somewhere else. In the football market, players perform being assets; in the fish market, fish perform their birthplace in exactly the same way. One difference: a player's value is verified by scouting reports, while a fish's value is verified by someone's spoken word.

In my thirty-seven years, I have learned a lesson first on the pitch and later in the bazaar of daily life. Where the ledger is broken, the loudest voice wins, not the most honest one. When, in an empty stadium, a single kicked ball echoed through the vacant stands, I understood that absence itself is a form of testimony. It is the same here. The missing proof is this market's largest piece of evidence.

— Root: Natore.

Let me note one more sentence. A false price can redraw a city's market — at a lower price, on lower trust, and with more suspicion.

Final Thought: Let the Ledger Begin at the Beel's Bank

So what is the solution? I am no representative of a technology company, so my proposal is simple. If Bangladesh builds a traceability system for its own market, it must begin from the fisher's hand — not from the arat. Take an identity, take a voice note, take a thumbprint, but the first block must belong to the person who lifted the fish into the net. Only then will the ledger be a ledger; otherwise it remains a tidy edition of the middleman's word.

And I leave one question unanswered, because the answer is not in my hands. If in the next ten years the beel grows smaller still, then the greater task, beyond protecting the truth of what is sold as "Chalan Beel fish," will be to save the beel itself. Because what cannot be saved by preserving proof is called memory — and memory can run a market, but it cannot run a life.