HomeFish encyclopediaRay-finned fishesSawbelliesSlimeheadsChilean roughy Chilean roughy (Hoplostethus fragilis) Scientific name: Hoplostethus fragilis de Buen, 1959 The Chilean roughy (Hoplostethus fragilis) is a marine fish of the family Trachichthyidae. Native range: Southeast Pacific, Valparaiso region of Chile. Species factsScientific nameHoplostethus fragilisFamilyTrachichthyidae (Slimeheads)OrderBeryciformes (Sawbellies)ClassActinopterygii (Ray-finned fishes)Depth range250–300 m (820–984 ft)EnvironmentMarine; bathypelagic; depth range 250 - 300 mClimateDeep-waterDistributionSoutheast Pacific: Valparaiso region of Chile.Conservation status (IUCN)Not EvaluatedThreat to humansHarmlessUsesFisheries: of no interestResilienceLow, 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