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); ucamara: Named for the geological term 'Ucamara Depression' describing the low-lying region between the lower reaches of the Ucayali and Marañon Rivers caused by subsidence in the upper Amazon foreland basin (Ref. 49730).
Environment: milieu / climate zone / depth range / distribution range
Ecology
Freshwater; benthopelagic. Tropical
South America: known only from the lowland Rio Ucayali basin in Peru.
Size / Weight / Age
Maturity: Lm ?  range ? - ? cm
Max length : 19.0 cm TL male/unsexed; (Ref. 49730)
Short description
Identification keys | Morphology | Morphometrics
Dorsal spines (total): 0; Dorsal soft rays (total): 0; Anal soft rays: 220 - 245. Color pattern with 18-24 dark brown bands separated by narrow pale interbands which are less than one-third the width of the dark bands (Ref. 49730).
Facultative air-breathing in the genus (Ref. 126274); Collected from static, vegetation-choked shallow water (Ref. 49730). Feeds on aquatic invertebrates (Ref. 49730).
Life cycle and mating behavior
Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae
Crampton, W.G.R., N.R. Lovejoy and J.S. Albert, 2003. Gymnotus ucamara: a new species of neotropical electric fish from the Peruvian Amazon (Ostariophysi: Gymnotidae), with notes on ecology and electric organ discharges. Zootaxa 277:1-18. (Ref. 49730)
IUCN Red List Status (Ref. 130435: Version 2025-2)
Threat to humans
Harmless
Human uses
Tools
Special reports
Download XML
Internet sources