HomeFish encyclopediaRay-finned fishesPerch-like fishRoundheadsWestern blue devil Western blue devil (Paraplesiops sinclairi) Scientific name: Paraplesiops sinclairi Hutchins, 1987 The Western blue devil (Paraplesiops sinclairi) is a marine fish of the family Plesiopidae. Native range: Eastern Indian Ocean, known only from southwestern Australia. BiologyAdults inhabit rocky reefs. Shy and probably nocturnal species. Eggs are guarded by the male parent. Minimum depth from.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameParaplesiops sinclairiFamilyPlesiopidae (Roundheads)OrderPerciformes (Perch-like fish)ClassActinopterygii (Ray-finned fishes)Maximum length22.0Depth range24–30 m (79–98 ft)EnvironmentMarine; reef-associated; depth range 24 - 30 mClimateSubtropicalDistributionEastern Indian Ocean: known only from southwestern Australia.Conservation status (IUCN)Not EvaluatedThreat to humansHarmlessResilienceMedium, 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