Actinopteri (ray-finned fishes) > Gymnotiformes
(Knifefishes) > Apteronotidae
(Ghost knifefishes) > Apteronotinae
Etymology: Sternarchorhynchus: Greek, sternon = sternon, + Greek, archos = anus + Greek, rhyngchos = snout (Ref. 45335). More on author: Steindachner.
Environment: milieu / climate zone / depth range / distribution range
Freshwater; benthopelagic; depth range - m (Ref. ), usually - m (Ref. ). Tropical; 0°C -
South America: mainstream of the Amazon River from Manaus in the central portions of the basin to the vicinity of Iquitos in north-eastern Peru, the Río Negro, and from the Río Orinoco basin in both Venezuela and south-eastern Colombia.
Size / Weight / Age
Maturity: Lm ?  range ? - ? cm
Max length : 54.0 cm TL male/unsexed; (Ref. 36886)
Juveniles were observed to live within várzea along the shores of the main river, whereas adults are inhabitants of main river channels (Ref. 84053).
Life cycle and mating behavior
Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae
de Santana, C. D. and R.P. Vari, 2010. Electric fishes of the genus Sternarchorhynchus (Teleostei, Ostariophysi, Gymnotiformes); phylogenetic and revisionary studies. Zool. J. Linn. Soc. 159:223-371. (Ref. 84053)
IUCN Red List Status (Ref. 124695)
Threat to humans
Common namesSynonymsMetabolismPredatorsEcotoxicologyReproductionMaturitySpawningSpawning aggregationFecundityEggsEgg development
ReferencesAquacultureAquaculture profileStrainsGeneticsAllele frequenciesHeritabilityDiseasesProcessingNutrientsMass conversion
Estimates based on models
Phylogenetic diversity index (Ref. 82805
= 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01000 (0.00244 - 0.04107), b=3.04 (2.81 - 3.27), in cm total length, based on all LWR estimates for this body shape (Ref. 93245
Trophic level (Ref. 69278
): 3.4 ±0.3 se; based on size and trophs of closest relatives
Vulnerability (Ref. 59153
): Low to moderate vulnerability (27 of 100) .