Classification / Names
Common names | Synonyms | Catalog of Fishes(genus, species) | ITIS | CoL | WoRMS | Cloffa
Teleostei (teleosts) >
Gymnotiformes (Knifefishes) >
Gymnotidae (Naked-back knifefishes) > Gymnotinae
Etymology: Gymnotus: Greek, gymnos = naked (Ref. 45335); chaviro: From the common name for Gymnotus in the language of the Asheninka indigenous people (Arawak/Maipurean language family). A noun in apposition.
Environment: milieu / climate zone / depth range / distribution range
Ecology
Freshwater; demersal; depth range 1 - 2 m (Ref. 83382). Tropical; 25°C - ? (Ref. 83382); 9°S - 10°S, 72°W - 73°W
South America: Peru (upper Yuruá basin, Department Ucayali and the Manu and Tampobata rivers of the Madre de Dios basin, Department Madre de Dios).
Size / Weight / Age
Maturity: Lm ?  range ? - ? cm
Max length : 27.5 cm SL male/unsexed; (Ref. 83382)
Short description
Identification keys | Morphology | Morphometrics
Gymnotus chaviro is unique among members of
the G. carapo group (sensu Albert et al., 2004) in having a color pattern composed of oblique, dark, unbroken pigment bands along the length of the body, dark band-pairs with wavy, irregular margins, mainly unbranched or incompletely separated, pale inter-bands rarely reaching to the dorsal midline on the anterior half of the body and crescent-shaped in abdominal area (Ref. 83382).
Facultative air-breathing in the genus (Ref. 126274)
Life cycle and mating behavior
Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae
Maxime, E.L. and J.S. Albert, 2009. A new species of Gymnotus (Gymnotiformes: Gymnotidae) from the Fitzcarrald Arch of southeastern Peru. Neotrop. Ichthyol. 7(4):579-585. (Ref. 83382)
IUCN Red List Status (Ref. 130435: Version 2025-2)
Threat to humans
Harmless
Human uses
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