Tidal flats, nicknamed "sea fields" in Korea, have long provided an important source of livelihoods for local people. The traditional practice of maintaining tidal flats as communal property has been transmitted to the present in the form of village cooperatives. Korean tidal flats are a treasure trove of diverse ocean resources and have held a disproportionate influence over the formation and development of the nation’s diet.

The practice of harvesting shellfish and other invertebrate animals in coastal wetlands enjoys a long and steady history on the Korean Peninsula. The western and southern coastal areas have produced many large shell middens dating to the New Stone, Bronze, and Iron Ages all the way to the Goryeo Dynasty. Written records on tidal flat harvesting can be found in a book on seafood from the Joseon period—Jasan eobo by the Practical Learning scholar Jeong Yak-jeon (1758–1816).

Tidal flat harvesting involves a number of performative rites, enriching Korean culture and traditions. The most well-known community tradition associated with it is the gaet je, a seasonal festival praying for a good harvest. In addition, there are separate community rituals for predicting the quantity of the catch or to celebrate a good harvest.

Tidal flat harvesting has been designated as National Intangible Cultural Heritage for the following reasons: It possesses a time-honored history with many active transmission communities over an extensive area; This history is supported by written records from at least the Joseon period; The diverse skills and techniques manifested in tidal flat harvesting hold great potential for academic research; There are many unique rites and festivals associated with tidal flat harvesting; The practice shows great local diversity through, for example, the different tools applied; and It continues to serve as an important source of livelihoods in Korean communities.

As tidal flat harvesting is being transmitted across the western and southern coastal areas in many villages, no particular individuals or organizations have been recognized as official holders of this element.