Apteronotus Acidops (Apteronotus acidops) is a ray-finned fish of the family Apteronotidae. It inhabits freshwater waters. This species can reach a maximum total length of 32.1 cm. With a trophic level of 3.3, it is a low-level carnivore, feeding on invertebrates and small organisms. It is assessed as Data Deficient on the IUCN Red List.
Anal soft rays: 162 - 220. Distinguished from other congeners by the following combination of characters: dorsal snout profile pointed; snout length 46.4 - 63.7 % of head length; oculo-nasal distance 39.2-72.1 % of postocular distance; lateral ethmoid with both dorsal and ventral extremities expanded, strongly oblique in orientation; mouth rictus surpassing vertical through anterior eye margin, including its skin folds, in all ages; dorsal head profile nearly horizontal from a vertical through anus to posterior extremity of occipital bone; absence of mid-dorsal white or clear stripe on head and body anteriorly; chin brown; upper lip clear to a vertical through anterior nostril; transversal unpigmented bar or bars posteriorly on the body absent; flanks brown, darker dorsally and pectoral fin hyaline, with chromatophores over rays .: elongated; Cross section: compressed.
Behavioural data for Apteronotus Acidops is currently being reviewed.
Freshwater; benthopelagic. Tropical South America: Upper rio Paraná basin in Brazil.
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