A small brown worm dug from the mudflats of the Fujian and Guangdong coasts, chewy and crunchy once cleaned. Boiled, it sets in its own jelly as 土笋冻; it is also pickled or cooked in soups and stir-fries.
Fishermen dig for peanut worms on the mudflats at low tide.
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Also called 土笋 or 可口革囊星虫: a sipunculid worm dug from coastal mudflats in southern China. Southern Fujian sets it into 土笋冻 (sea worm jelly); on the Leizhou Peninsula it is usually pickled. 沙虫 is a different worm, longer and thinner.