HomeFish encyclopediaRay-finned fishesLightfishes and DragonfishesBarbeled dragonfishesBigbarb dragonfish Bigbarb dragonfish (Eustomias macronema) Scientific name: Eustomias macronema Regan & Trewavas, 1930 The Bigbarb dragonfish (Eustomias macronema) is a marine fish of the family Stomiidae. Native range: Atlantic Ocean, roughly between 35?-20?N; near 30?W between 20?-25?S. Also known from the Indian and Pacific oceans. Species factsScientific nameEustomias macronemaFamilyStomiidae (Barbeled dragonfishes)OrderStomiiformes (Lightfishes and Dragonfishes)ClassActinopterygii (Ray-finned fishes)Maximum length17.2EnvironmentMarine; bathypelagicClimateDeep-waterDistributionAtlantic Ocean: roughly between 35?-20?N; near 30?W between 20?-25?S. Also known from the Indian and Pacific oceans.Conservation status (IUCN)Not EvaluatedThreat to humansHarmlessUsesFisheries: of potential interestResilienceHigh, minimum population doubling time less than 15 months (Preliminary K or Fecundity.) SourcesTaxonomy, distribution and biology data: FishBase (Froese, R. and D. Pauly, eds.), licensed CC BY-NC 4.0.Last updated 27 September 2026