Featherback fish (Notopterus notopterus), also known as the knifefish, is a freshwater species native to Southeast Asia, particularly found in Vietnam, Thailand, and Cambodia. It is distinguished by its long, slender body resembling the shape of a knife. This fish is highly prized for its tender, white meat, which has a mild flavor, making it perfect for various culinary uses. In Vietnamese cuisine, thát lát is often used to make fish cakes, soups, and grilled dishes. The meat is also rich in protein and low in fat, making it a healthy choice for consumers. Additionally, thát lát fish is considered a versatile ingredient due to its ability to absorb different flavors, enhancing the taste of traditional recipes. As a result, it holds an important place in both local markets and Vietnamese cultural gastronomy.