Family Mastacembelidae

Macrognathus - Macrognathus is a genus of eel-like fish of the family Mastacembelidae of the order Synbranchiformes.

Mastacembelus - Mastacembelus is a genus of many species of spiny eel fish from the family Mastacembelidae.

Sinobdella - The placement of this genus has been debated.