Do Basa fish fillets have another name and where does this fish come from?

Basa is a type of catfish.   Other names include Basa Fish, Bocourti, Bocourti Catfish, Bocourti Fish, Sutchi Catfish, and Pangasius. The scientific name for Basa is Pangasius bocourti.  A close relative, Pangasius hypophthalmus, or Tra, is also sometimes sold as Basa

Basa are native to Cambodia, Laos, Thailand and Vietname, with the primary commercial source appearing to be the Mekong River Delta in Vietnam.  According to Time.com, Basa accounted for approximately 20% of the catfish sold in the United States in 2002.