Facultative air-breathing in the genus ; Collected from the lower reaches of meandering upland (non-floodplain) streams, in undercut banks and submerged vegetation .
Dorsal spines (total): 0; Dorsal soft rays (total): 0; Anal soft rays: 180 - 240. Color pattern composed of narrow pale bands (about 1/4 width of dark bands) on anterior half of body, approximately equally narrow dorsally and ventrally, and 5-8 partially divided, often H-shaped dark bands on posterior half of body .
Behavioural data for Gymnotus Javari is currently being reviewed.
Freshwater; benthopelagic. Tropical South America: Western Amazon, from the Río Amazonas, the lower portions of the Napo, Javari and Ucayali basins.
Occurrence records from the Global Biodiversity Information Facility (GBIF) - 1 records indexed .
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