Tom Yam with Asian Redtail Catfish

Tom yam with Asian redtail catfish is a variation of the classic Thai hot and sour soup, distinguished by the use of freshwater fish from the genus *Hemibagrus*. Known for its firm, mild-flavored flesh, the Asian redtail catfish is a common ingredient in central and northeastern Thai cuisine, where it is simmered in a broth infused with lemongrass, galangal, kaffir lime leaves, bird’s eye chilies, and lime juice. The soup derives its characteristic heat and acidity from crushed fresh chilies and tamarind or lime, while fish sauce provides saltiness. Unlike the more famous tom yam goong (shrimp), the catfish version offers a deeper, earthier flavor and a meatier texture.

A great version is defined by the balance of sour, spicy, and salty elements, with the catfish cooked just until tender—overcooking can cause the flesh to flake apart. The broth should be clear and aromatic, not cloudy, and the heat should linger without overwhelming the fish’s natural sweetness. Fresh kaffir lime leaves and galangal are essential for an authentic fragrance.

Regional variations exist throughout Thailand: in the south, cooks may add turmeric or coconut milk for a richer soup, while in the northeast (Isan), the broth is typically thinner and more aggressively spiced. A notable rendition is served at Baan Ta Ko Rai in Tambon Khan Ham, Thailandia, where creator BANKII highlights the use of locally sourced redtail catfish in a traditional tom yam preparation. The dish is also found in Laos and parts of Cambodia, where it may incorporate local herbs like sawtooth coriander. Though less common internationally than the shrimp version, tom yam with Asian redtail catfish remains a beloved regional specialty, prized for its robust, rustic character.