HomeFish encyclopediaRay-finned fishesCodsGrenadiers or rattailsTreadfin grenadier Treadfin grenadier (Gadomus longifilis) Scientific name: Gadomus longifilis Goode & Bean, 1885 The Treadfin grenadier (Gadomus longifilis) is a marine fish of the family Macrouridae. BiologyBrownish in color. Mouth and gill chamber dark brown to black. Dark median stripe on the gill lamellae.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameGadomus longifilisFamilyMacrouridae (Grenadiers or rattails)OrderGadiformes (Cods)ClassActinopterygii (Ray-finned fishes)Maximum length30.0Depth range630–2165 m (2067–7103 ft)EnvironmentMarine; bathypelagic; depth range 630 - 2165 mClimateDeep-waterDistributionAtlantic Ocean: Eastern Atlantic: Gulf of Guinea, off Mauritania, Canary Islands, off Portugal, Morocco, and Azores. Western Atlantic: off the east coast of Florida, Straits of Florida, the Gulf of Mexico, and the Caribbean Sea. Reported off the Guianas.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