HomeFish encyclopediaRay-finned fishesPerch-like fishSea basses: groupers and fairy bassletsLongfin perchlet Longfin perchlet (Plectranthias longimanus) Scientific name: Plectranthias longimanus Weber, 1913 The Longfin perchlet (Plectranthias longimanus) is a marine fish of the family Serranidae. Native range: Indo-West Pacific, East Africa to Fiji, north to southern Japan, south to Queensland. Recently recorded from Tonga. BiologyA cryptic, shallow-water species collected with the use of ichthyocides. Secretive amongst small boulders or bommies on coastal sand slopes with rich invertebrate and algae growth.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific namePlectranthias longimanusFamilySerranidae (Sea basses: groupers and fairy basslets)OrderPerciformes (Perch-like fish)ClassActinopterygii (Ray-finned fishes)Maximum length3.5Depth range6–75 m (20–246 ft)EnvironmentMarine; reef-associated; depth range 6 - 75 mClimateTropicalDistributionIndo-West Pacific: East Africa to Fiji, north to southern Japan, south to Queensland. Recently recorded from Tonga.Conservation status (IUCN)Not EvaluatedThreat to humansHarmlessResilienceHigh, minimum population doubling time less than 15 months (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