HomeFish encyclopediaRay-finned fishesCodsGrenadiers or rattailsAmami grenadier Amami grenadier (Coryphaenoides marginatus) Scientific name: Coryphaenoides marginatus Steindachner & D?derlein, 1887 The Amami grenadier (Coryphaenoides marginatus) is a marine fish of the family Macrouridae. In the aquarium it needs water at 5–7°C (41–45°F). Native range: Northwest Pacific, southern Japan to the East China Sea. Amami grenadier care at a glanceTemperature5–7°C (41–45°F) BiologyDorsal spines (total): 2; Anal spines: 0. Head almost completely scaled, except for the underside of the snout and anteriorly on the mandibular rami. Snout short, pointed, with stout conical tubercle at its tip and lateral angles; suborbital ridge prominent; mouth small; chin barbel very small. Scales rather deciduous; body scales with slender spinules in 7 to 19 parallel rows. Pyloric caeca 11 to 14, about half of orbit diameter, directed anteriorly. Overall color is purplish brown, lighter ventrally on head and trunk; oral and branchial cavities blackish; fins blackish.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameCoryphaenoides marginatusFamilyMacrouridae (Grenadiers or rattails)OrderGadiformes (Cods)ClassActinopterygii (Ray-finned fishes)Maximum length62.0Depth range250–790 m (820–2592 ft)EnvironmentMarine; bathydemersal; non-migratory; depth range 250 - 790 mClimateDeep-waterDistributionNorthwest Pacific: southern Japan to the East China Sea.Conservation status (IUCN)Not EvaluatedThreat to humansHarmlessUsesFisheries: minor commercialResilienceLow, minimum population doubling time 4.5 - 14 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