HomeFish encyclopediaRay-finned fishesCodsGrenadiers or rattailsSmalltooth grenadier Smalltooth grenadier (Nezumia micronychodon) Scientific name: Nezumia micronychodon Iwamoto, 1970 The Smalltooth grenadier (Nezumia micronychodon) is a marine fish of the family Macrouridae. Native range: Eastern Central Atlantic, Western Sahara south to Angola. BiologyDorsal spines (total): 2; Dorsal soft rays (total): 140-141. Head large; eyes also large; snout short, narrow, bluntly acute, with a small bifid scute at its tip. Head completely scaled except for underside of snout. Body tapering to a point posteriorly from behind the origin of the first dorsal fin base. Pyloric caeca 20. Spinules on scales broad, shield-shaped. Overall color is brownish to swarthy; trunk bluish to violet; fins blackish; mouth and gill cavities gray to blackish.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameNezumia micronychodonFamilyMacrouridae (Grenadiers or rattails)OrderGadiformes (Cods)ClassActinopterygii (Ray-finned fishes)Maximum length34.0Depth range366–1620 m (1201–5315 ft)EnvironmentMarine; bathydemersal; non-migratory; depth range 366 - 1620 m, usually 500 - 600 mClimateDeep-waterDistributionEastern Central Atlantic: Western Sahara south to Angola.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