HomeFish encyclopediaSharks and RaysElectric raysNumbfishesSlender electric ray Slender electric ray (Narcine rierai) Scientific name: Narcine rierai Lloris & Rucabado, 1991 The Slender electric ray (Narcine rierai) is a marine fish of the family Narcinidae. Native range: Western Indian Ocean, central Somalia to at least Mozambique. BiologyShovel-shaped disc with a long tail (much longer than disc length); a longer-than-wide nasal curtain; slender tooth bands that are subtriangular in shape. Uniform light brown or golden-brown dorsally.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameNarcine rieraiFamilyNarcinidae (Numbfishes)OrderTorpediniformes (Electric rays)ClassElasmobranchii (Sharks and Rays)Maximum length30.1Depth range169–214 m (554–702 ft)EnvironmentMarine; bathydemersal; depth range 169 - 214 mClimateDeep-waterDistributionWestern Indian Ocean: central Somalia to at least Mozambique.Conservation status (IUCN)Data deficient (DD)Threat to humansHarmlessResilienceLow, minimum population doubling time 4.5 - 14 years (Assuming fecundity SourcesTaxonomy, distribution and biology data: FishBase (Froese, R. and D. Pauly, eds.), licensed CC BY-NC 4.0.Last updated 27 September 2026