Carp farming in rice fields is a significant economic and cultural practice among various ethnic communities in Vietnam, particularly the Tay people in Ha Giang province's Yen Minh district. This unique farming method, passed down through generations, involves raising carp in flooded rice fields, which not only provides a vital food source but also helps control pests and enhances rice productivity. The cultural significance of carp farming is highlighted by the annual Fish Festival, recognized as a National Intangible Cultural Heritage, where carp is a staple food and featured in traditional games and dishes. The practice has been supported by the district to improve the economic well-being of poor households, with notable success. The article underscores the importance of this sustainable and culturally rich farming method in the region and its potential to enhance tourism by showcasing the distinctive cultural heritage of ethnic groups.