New rules for clam digging: keep the big ones, take the trash

After short videos made tide-flat foraging famous, the mudflat at Yun'ao village nearly got picked bald.

The beach there is a natural shellfish ground: clams, whelks, small crabs, all of it scratchable out of the mud once the tide goes out. Video bloggers came with cameras to livestream their digging, one sack per session, and the audience nationwide drooled. On weekends the flat took in a thousand people a day at its worst. Small shovels, rakes, salt bottles — salt being the cruel trick for driving crabs out of their holes. One tide turned the whole flat upside down. Palm-length juvenile fish got tossed back onto the mud to die in the sun. Egg-bearing female crabs got carried off. Plastic bags and water bottles stayed behind in the intertidal zone.

Old Zheng squatted beside his family's ancestral spot and watched for a whole day. His chest hurt. "The flat is alive," he said. "Strip it like this and in three years it's a dead flat."

The village called a meeting with one item on the agenda: do we regulate this or not. Some said you can't. The flat is public. Tourists come from hundreds of kilometers away — on what grounds do you stop them? Old Zheng stood up and said the sentence that later became the preamble to every rule: "The sea belongs to everyone, but the flat is our living room. Guests come, we welcome them. Guests flip the table, we don't."

So the village did not ban foraging. It wrote three new rules, had them painted on a big board at the entrance to the flat, in Chinese and English:

One: keep the big, release the small. Undersized shellfish and egg-bearing female crabs go back in the water.

Two: take your trash. Every bag and bottle you carry in, carry out. Carry out one extra bag and that's better still.

Three: tools have limits. No salt for forcing crabs out — it wrecks the flat. No turning over the undersides of rocks.

To get people to actually accept it, the village didn't shout. It did three things. It trained a group of villagers as flat guides, unpaid, who told anyone within reach why you keep the big and release the small: the small one goes back, next year it's big, and your kids can still come and dig. It set up a free lending station at the entrance with size cards — a piece of hard plastic, hold it against your catch and you know. And the primary school children formed a volunteer team of "little flat keepers" who spent weekends picking up trash and gently advising visitors.

It worked better than fines. Visitors noticed the Yun'ao flat was not like other flats. The guides dug alongside you, and when you turned up something small they showed you how to put it back, which people described as healing to watch. Parents said what they were digging here wasn't clams, it was a nature lesson for their children. One blogger livestreamed the whole keep-the-big-release-the-small process, and the comments ran the same way: these villagers are good people, we're coming next time.

A tourism boom is a double-edged thing: it can strip a mudflat bare, and it can turn the cost of protection into income. Yun'ao chose the second. It turned visitors from harvesters into guardians.

Three years on, the flat's resources have gone up rather than down. Clam density is back to what it was before the short-video era, and the share of large specimens has risen noticeably. The village started a tide-flat festival. The centerpiece is not a clam-digging contest but a release contest — scattering cultivated seed back onto the mud. The finale is a cleanup sprint: in half an hour, who can bring back the most trash. First prize is an apron printed with a drawing by a village child: a flat, a few crabs, the sun hanging in the sky.