Elasmobranchii (sharks and rays) > Torpediniformes
(Electric rays) > Narkidae
Etymology: Heteronarce: Greek, heteros = other + Greek, narke = numbness (Ref. 45335).
Environment: milieu / climate zone / depth range / distribution range
Marine; demersal; depth range 73 - 346 m (Ref. 26165). Tropical; 14°N - 3°N, 45°E - 76°E (Ref. 114953)
Western Indian Ocean: Somalia, Gulf of Aden to Arabian Sea (off India).
Size / Weight / Age
Maturity: Lm ?  range ? - ? cm
Max length : 22.5 cm SL male/unsexed; (Ref. 26165); 19.5 cm (female)
Found in deep waters (Ref. 26165). Known from few specimens. Size presumably exceeds 30 cm TL. Males reaches maturity at ca. 20 cm TL. Biology and reproduction unknown (Ref. 114953).
Life cycle and mating behavior
Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae
Weitkamp, D.E. and R.D. Sullivan, 2003. Gas bubble disease in resident fish of the lower Clark Fork River. Trans. Am. Fish. Soc. 132(5):865-876. (Ref. 26165)
IUCN Red List Status (Ref. 120744)
CITES (Ref. 118484)
Threat to humans
ReferencesAquacultureAquaculture profileStrainsGeneticsAllele frequenciesHeritabilityDiseasesProcessingMass conversion
Estimates based on models
Phylogenetic diversity index (Ref. 82805
= 0.5627 [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
): 3.3 ±0.3 se; Based on size and trophs of closest relatives
Resilience (Ref. 120179
): Low, minimum population doubling time 4.5 - 14 years (Assuming fecundity<100).
Vulnerability (Ref. 59153
): Low vulnerability (17 of 100) .