HomeFish encyclopediaSharks and RaysElectric raysNumbfishesTonkin numbfish Tonkin numbfish (Narcine prodorsalis) Scientific name: Narcine prodorsalis Bessednov, 1966 The Tonkin numbfish (Narcine prodorsalis) is a marine fish of the family Narcinidae. Native range: Western Pacific, off China to Java, Indonesia. BiologyFound in continental waters, both inshore and offshore. Biology little known.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameNarcine prodorsalisFamilyNarcinidae (Numbfishes)OrderTorpediniformes (Electric rays)ClassElasmobranchii (Sharks and Rays)Maximum length40.0Depth range50 m (164 ft)EnvironmentMarine; demersal; depth range 50 - 50 mClimateTropicalDistributionWestern Pacific: off China to Java, Indonesia.Conservation status (IUCN)Data deficient (DD)Threat to humansOtherResilienceLow, 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