Taiwan Food Atlas

Kinmen Peanut Worm Soup

A rare phascolosoma esculenta from the Lieyu intertidal zone — dried and simmered into an extraordinarily sweet broth
📍 Kinmen · Lieyu Shanglin Village Coast🌟 Collector's Pick · Seafood🔖 Phascolosoma esculenta · Rare local ingredient · Lieyu exclusive

Kinmen sand worm is a species of intertidal invertebrate (Sipunculus nudus) harvested along the mudflats of Lieyu Township; because the fishermen who dig them are aging or retiring, the dried, slow-simmered soup has become an increasingly rare local delicacy.

Sand worms (Sipunculus nudus) are marine invertebrates in the phylum Sipuncula, found along coastal mudflats in Fujian, Guangdong, Guangxi, Hainan, and Taiwan including Kinmen. According to the Kinmen County Government's official website, the fishermen who once dug sand worms for sale are now mostly aged, retired, or deceased, and the dish has become an increasingly rare local seafood, with very few practitioners remaining.

What is Kinmen Peanut Worm Soup

Freshly harvested peanut worms must be everted and thoroughly flushed to clean out the sand inside — a meticulous process that is the main challenge of cooking them. Dried peanut worms are soaked in cold water to reconstitute, then simmered in a pot; the broth is clear with a pale yellow tinge and intensely sweet with a clean finish, free of any marine smell. The fresh version is blanched in ginger water, cut into sections, and added to the soup; the texture is crisp and springy. Both preparations are simple and understated, relying entirely on the ingredient's natural flavor — minimal seasoning needed.

The Kinmen County Agriculture Bureau's fishery resources survey confirms that phascolosoma esculenta (peanut worm) is a resource unique to the intertidal zone of Lieyu, Kinmen, and a traditional Minnan coastal ingredient with recorded use in Xiamen, Zhangzhou, and elsewhere along the Fujian coast. Fishing village restaurants on Lieyu occasionally have it on the menu, but because harvesting depends entirely on manual intertidal digging and is heavily affected by weather and tides, it is not a reliable year-round item. This is a rare dish of the 'if you encounter it, you were meant to' variety.

How to eat it the local way

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Call ahead to confirm availabilityPeanut worm soup is not available every day. Before heading to Lieyu, always call the local restaurant or fishing village eatery to confirm whether there is stock that week or that day.
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Only available after low tidePeanut worms can only be dug after the tide pulls back at a large low tide. Understanding the tidal cycle helps predict when fresh stock might be available; they tend to appear more often after the spring tides around the vernal equinox.
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Clear broth, no seasoningThe natural sweetness of peanut worm soup is exceptionally strong. The authentic approach is clear broth without MSG — at most a few slices of ginger to neutralize any off notes. Adding soy sauce will mask what makes it special.
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Dried peanut worms can be taken homeSome fishing village shops on Lieyu sell sun-dried peanut worms. You can bring them home to simmer your own broth — a far more practical option to carry back to Taiwan than live product.

Local knowledge

Objective credentials

  • The Kinmen County Agriculture Bureau fishery resources survey confirms that phascolosoma esculenta (peanut worm) is a resource unique to the intertidal zone of Lieyu, Kinmen, and a traditional Minnan coastal ingredient.
  • Peanut worms (phascolosoma esculenta) are eaten in Xiamen, Zhangzhou, and other Minnan coastal areas; the Lieyu version preserves the most original clear-broth preparation style.

Visitor tips

  • Peanut worm soup is not a reliably available dish. Traveling to Lieyu specifically to eat it carries a high risk of coming away empty-handed. Treat it as the highlight of your itinerary rather than the sole purpose of the trip.
  • Peanut worm soup that has not been cleaned thoroughly will have a gritty texture. Pay attention while eating, and if you notice obvious sand in the broth, let the restaurant know.
  • Peanut worms are invertebrates. Those with seafood allergies should still exercise caution — they belong to a different phylum from shellfish and crustaceans, but individuals with allergic constitutions should seek advice before eating.

Sources: Kinmen County Agriculture Bureau fishery resources survey; records of phascolosoma esculenta food culture along the Minnan coast. Photos to be replaced with Dio's own shots.

Frequently Asked Questions

What is Kinmen sand worm soup made from?

It is made by simmering dried or freshly caught sand worms (Sipunculus nudus) into a clear, naturally sweet broth.

What kind of creature is a sand worm?

It is Sipunculus nudus, a marine invertebrate in the phylum Sipuncula — not a true worm.

Why has sand worm soup become rare in Kinmen?

Harvesting is labor-intensive, and the fishermen who once dug them are now mostly aged, retired, or deceased, reducing supply each year.

Where are sand worms found?

They inhabit coastal mudflats in Fujian, Guangdong, Guangxi, and Hainan, as well as Taiwan proper and Kinmen's Lieyu Township.

Sources

🗺️ View on the map ← All Kinmen dishes