HomeFish encyclopediaRay-finned fishesPerch-like fishSea basses: groupers and fairy bassletsFilamentous perchlet Filamentous perchlet (Plectranthias robertsi) Scientific name: Plectranthias robertsi Randall & Hoese, 1995 The Filamentous perchlet (Plectranthias robertsi) is a marine fish of the family Serranidae. Native range: Western Pacific, Queensland, Australia. Species factsScientific namePlectranthias robertsiFamilySerranidae (Sea basses: groupers and fairy basslets)OrderPerciformes (Perch-like fish)ClassActinopterygii (Ray-finned fishes)Maximum length8.95Depth range220–400 m (722–1312 ft)EnvironmentMarine; bathypelagic; depth range 220 - 400 mClimateDeep-waterDistributionWestern Pacific: Queensland, Australia.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