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Tire track eel
The tire track eel (''Mastacembelus armatus'') is a species of ray-finned, spiny eels belonging to the genus ''Mastacembelus'' (Scopoli, 1777)〔( Integrated Taxonomic Information System, National Museum of Natural History, Washington, D.C., Mastacembelus armatus (Lacepède, 1800), Taxonomic Serial No.: 172692, 2007 ), retrieved on:5 June 2007.〕 of the family Mastacembelidae, and is native to the riverine fauna of India, Pakistan, Sumatra, Sri Lanka, Thailand, Viet Nam, Indonesia and other parts of South East Asia. The species was named ''Mastacembelus armatus'' by Lacepède in 1800. Other common names for this popular aquarium species are zigzag eel, spiny eel, leopard spiny eel〔(Leopard spiny eel (Mastacembelus armatus), BangkokAquarium.com, Bangkok, Thailand, 2006 ), retrieved on: 5 June 2007.〕 and white-spotted spiny eel. This species is not only a popular aquarium fish but also as a food fish in its country of origin.〔( Butler, Rhett Ayers, Tire track Eel, Spiny Eel, White-spotted Spiny Eel (Mastacembelus armatus), Tropical Freshwater Aquarium Fish (TFAF), 1995 and Mongabay.com, 2006 ), retrieved on: 5 June 2007.〕
==Description==
''Mastacembelus armatus'' is a large elongated fish that has a snake-like body without pelvic fins. Its anal and dorsal fins are elongated and are connected to the caudal fin. The dorsal fin is preceded by numerous spines.〔(Foster and Smith, Veterinary & Aquatic Services Department, Drs. Foster & Smith, Inc., PetEducation.com, 2007 ), retrieved on: 5 June 2007.〕 The back is dark beige in color while the head is silver-beige. The body’s color is dull brown and the belly is a lighter shade of brown. The body may also be marked with brown circular patterns. The body also have one to three darker longitudinal zigzag lines that connect to form a distinct reticulated pattern that is restricted to the dorsal two-thirds of the body. The eyes have brown stripes running laterally through them.〔〔
''Mastacembelus armatus'' can reach up to 36" (91 cm) in its natural habitat but does not usually exceed 20" (51 cm) in captivity.〔〔
Despite its eel-like appearance, ''Mastacembelus armatus'' is not considered a true eel.〔
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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