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The banded knifefish (Gymnotus carapo) is a species of gymniform knifefish native to a wide range of freshwater habitats in South America. [1] It is the most widespread species of Gymnotus, [1] but it has frequently been confused with several relatives, including some found outside its range like the Central America G. maculosus.
Despite the name, the electric eel is a type of knifefish. The Gymnotiformes / dʒ ɪ m ˈ n ɒ t ɪ f ɔːr m iː z / are an order of teleost bony fishes commonly known as Neotropical knifefish or South American knifefish. They have long bodies and swim using undulations of their elongated anal fin.
Common names of fish can refer to a single species; to an entire group of species, such as a genus or family; or to multiple unrelated species or groups. Ambiguous common names are accompanied by their possible meanings. Scientific names for individual species and higher taxa are included in parentheses.
The name is from the Greek ήλεκτρον (ḗlektron 'amber, a substance able to hold static electricity'), and φέρω (phérō 'I carry'), giving the meaning 'electricity bearer'. [ 1 ] [ 10 ] In 1872, Gill decided that the electric eel was sufficiently distinct to have its own family, Electrophoridae. [ 11 ]
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Knifefish may refer to several knife-shaped fishes: The Neotropical or weakly electric knifefishes, order Gymnotiformes, containing five families: Family Gymnotidae (banded knifefishes and the electric eel) Family Rhamphichthyidae (sand knifefishes) Family Hypopomidae (bluntnose knifefishes) Family Sternopygidae (glass and rat-tail knifefishes)
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Like the other gymnotiforms, gymnotids have classic knifefish bodies. The body is long and eel-like, the dorsal fin and pelvic fins are absent, and the anal fin is extremely long and used for movement.