HomeFish encyclopediaRay-finned fishesCodsGrenadiers or rattailsDuckbill grenadier Duckbill grenadier (Coelorinchus anatirostris) Scientific name: Coelorinchus anatirostris Jordan & Gilbert, 1904 The Duckbill grenadier (Coelorinchus anatirostris) is a marine fish of the family Macrouridae. In the aquarium it needs water at 7–12°C (45–54°F). Native range: Northwest Pacific, southern Japan and Taiwan. Duckbill grenadier care at a glanceTemperature7–12°C (45–54°F) BiologyDorsal spines (total): 0; Anal spines: 0. Body tapering posteriorly from the origin of the first dorsal fin. Snout moderately long and pointed. Body covered with scales with narrowly lanceolate to triangular spinules. Pyloric caeca 21 to 30. Body is grayish, fins dusky to black. Mouth cavity grayish; gill cavity blackish.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameCoelorinchus anatirostrisFamilyMacrouridae (Grenadiers or rattails)OrderGadiformes (Cods)ClassActinopterygii (Ray-finned fishes)Maximum length43.0Depth range300–550 m (984–1804 ft)EnvironmentMarine; bathydemersal; non-migratory; depth range 300 - 550 mClimateDeep-waterDistributionNorthwest Pacific: southern Japan and Taiwan.Conservation status (IUCN)Not EvaluatedThreat to humansHarmlessUsesFisheries: minor commercialResilienceMedium, 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