Thuy Viet commune is a commune of Thai Thuy district bordering the Hoa river with especially delicious riverside products. Among them, the fish here is considered the most special. Cay is a species of crab family, small size, red, big, hairy legs and carapace with many veins. In the rice fields of Thuy Viet Organic Rice Cooperative, all are produced by organic methods, so that the fish living here have a clean and favorable environment. The fish here has a bright color, the bigger it is, the firmer the meat and the sweet taste. Especially, it has been tested for no chemical drug residues or toxic ingredients harmful to health.

Fish is rich in protid, lipid, calcium, iron and vitamins and minerals. According to Oriental medicine, fish is similar to crabs, has a salty taste, a fishy smell, a welding property, a blood tonic effect, heals tendons and bones, clears blood vessels, and injures blood stasis. Fish has an advantage over field crabs that it does not cause allergies for those who are sensitive to seafood, especially, pregnant and nursing mothers can eat fish comfortably to supplement a large amount of natural calcium. Thuy Viet fresh fish can be used to make delicious, sweet and cool fish soup for the summer, or the famous fish sauce dish in Thai Binh's hometown.