Mastacembelus is a genus of many species of spiny eel fish from the family Mastacembelidae. They are native to Africa (c. 45 species) and Asia (c. 15 species).[4] Most are found in rivers and associated systems (even in rapids[5]), but there are also species in other freshwater habitats and a particularly rich radiation is found in the Lake Tanganyika basin with 15 species (14 endemic).[6][7] A few species can even occur in brackish water.[8]
^Brown; Britz; Bills; Rüber; Day (2011). "Pectoral fin loss in the Mastacembelidae: a new species from Lake Tanganyika". Journal of Zoology. 284 (4): 286–293. doi:10.1111/j.1469-7998.2011.00804.x.