HomeFish encyclopediaRay-finned fishesPerch-like fishSea basses: groupers and fairy bassletsThreadfin bass Threadfin bass (Pronotogrammus multifasciatus) Scientific name: Pronotogrammus multifasciatus Gill, 1863 The Threadfin bass (Pronotogrammus multifasciatus) is a marine fish of the family Serranidae. Native range: Eastern Pacific, Los Angeles County in southern California, USA to northern Peru. BiologyInhabits rough bottom, deep reefs. Feeds on small planktonic crustaceans.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific namePronotogrammus multifasciatusFamilySerranidae (Sea basses: groupers and fairy basslets)OrderPerciformes (Perch-like fish)ClassActinopterygii (Ray-finned fishes)Maximum length26.0Depth range40–200 m (131–656 ft)EnvironmentMarine; demersal; depth range 40 - 200 mClimateSubtropicalDistributionEastern Pacific: Los Angeles County in southern California, USA to northern Peru.Conservation status (IUCN)Least Concern (LC)Threat to humansHarmlessUsesFisheries: of no interestResilienceMedium, 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