Bà Thạo is a Vietnamese producer and retailer of traditional fermented products associated with the cuisine of Châu Đốc and the Mekong Delta. The brand operates through Mắm Bà Thạo Company Limited which is based in Ho Chi Minh City. Its range is centered on fermented fish, crabs, shrimp, and vegetables prepared according to recipes characteristic of southern Vietnam. The producer states that its fish are sourced from the rivers and canals of the Mekong Basin. The species used include snakehead fish, snakeskin gourami, small linh fish, catfish, and anchovies. The fish are cleaned, salted, and left to ferment until they develop a pronounced aroma and a complex salty-sweet flavor. The range includes whole fermented fish, fillets, cut pieces, and ground sauces intended for seasoning different dishes. Bà Thạo also produces mắm ruốc which is a fermented paste made from small shrimp. Other products include pickled shrimp, fermented salted crabs, mắm nêm, and several types of fermented vegetables. These products are served as side dishes or used as bases for sauces and seasonings in dishes containing rice, noodles, meat, and vegetables.