Spiny eel (Mastacembelus sp.) is a freshwater fish that is distributed on the islands of Java, Sumatera and Kalimantan. Mastacembelus erythrotaenia has been found in the Musi River and Mastacembelus unicolor has been found in the Enim River, the two species have different colors and patterns on their bodies. Therefore, it is necessary to study the genetic characteristics of these two species. T…