HomeFish encyclopediaRay-finned fishesSawbelliesSlimeheadsSmallscale slimehead Smallscale slimehead (Hoplostethus melanopus) Scientific name: Hoplostethus melanopus Weber, 1913 The Smallscale slimehead (Hoplostethus melanopus) is a marine fish of the family Trachichthyidae. BiologyDorsal spines (total): 4 - 5; Dorsal soft rays (total): 13-16; Anal spines: 2 - 3; Anal soft rays: 8 - 10. Body and head brownish grey; fins dusky to blackish.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameHoplostethus melanopusFamilyTrachichthyidae (Slimeheads)OrderBeryciformes (Sawbellies)ClassActinopterygii (Ray-finned fishes)Maximum length25.0Depth range400–914 m (1312–2999 ft)EnvironmentMarine; bathydemersal; depth range 400 - 914 mClimateDeep-waterDistributionIndo-West Pacific: Natal in South Africa, Somalia, the United Arabic Emirates on the Madagascar Ridge to Japan (Jon Moore, pers. comm.) and Indonesia. Southeast Atlantic: off Namibia and Cape Town, South Africa.Conservation status (IUCN)Not EvaluatedThreat to humansHarmlessResilienceLow, 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