Native to southern Malay Peninsula, southeastern Sumatra, and parts of Borneo. This individual unfortunately appears to have a physical birth defect, a feature questionably commercialized in the aquarium fish industy.
@Caribbean Flamingo there is atleast one "normal" hemibagrus, but visually I don't think that is this exact species. With how niche this species is in the trade, this seems more like an genuine birth defect that is noticable later after it grew to this size, not something that they intentionally get for "oddity" sake.