HomeFish encyclopediaRay-finned fishesLightfishes and DragonfishesBarbeled dragonfishesYellowstem dragonfish Yellowstem dragonfish (Eustomias macrurus) Scientific name: Eustomias macrurus Regan & Trewavas, 1930 The Yellowstem dragonfish (Eustomias macrurus) is a marine fish of the family Stomiidae. BiologyDorsal soft rays: 29; Anal soft rays: 45. Barbel unadorned, oblong bulb, stem white with a series of rounded light yellowish patches.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameEustomias macrurusFamilyStomiidae (Barbeled dragonfishes)OrderStomiiformes (Lightfishes and Dragonfishes)ClassActinopterygii (Ray-finned fishes)Maximum length27.6EnvironmentMarine; bathypelagicClimateDeep-waterDistributionEastern Atlantic: west of 15?W between the equator and 6?N, and from 13?S-17?S between 5?W and 10?W. Western Atlantic: off USA south to the equator including the Gulf of Mexico and the Antilles, and off Brazil. Also known from the Indian and Pacific Oceans.Conservation status (IUCN)Not EvaluatedThreat to humansHarmlessResilienceMedium, minimum population doubling time 1.4 - 4.4 years (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