 Zig-zag eel

The zig-zag eel ("Mastacembelus armatus"), also known as the tire-track eel, tire-track spiny eel or marbled spiny eel, is a species of ray-finned, spiny eels belonging to the genus "Mastacembelus" (Scopoli, 1777) of the family Mastacembelidae, and is native to the riverine fauna of India, Bangladesh, Pakistan, Sri Lanka, Thailand, Viet Nam, Indonesia and other parts of South East Asia.The species was described as "Macrognathus armatus" by Lacepède in 1800.