HomeMarine aquarium fishGobies, blennies & dottybacksNorthern blue devil Northern blue devil (Paraplesiops poweri) Scientific name: Paraplesiops poweri Ogilby, 1908 The Northern blue devil (Paraplesiops poweri) is a marine fish of the family Plesiopidae. In the aquarium it needs water at 20–26°C (68–79°F). Native range: Southwest Pacific, Australia. Northern blue devil care at a glanceTemperature20–26°C (68–79°F) BiologyAdults are benthic species which occurs inshore. They inhabit coral reef and rock reef. Eggs are guarded by the male parent.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameParaplesiops poweriFamilyPlesiopidae (Roundheads)OrderPerciformes (Perch-like fish)ClassActinopterygii (Ray-finned fishes)Maximum length8.3EnvironmentMarine; reef-associated, usually 10 - 20 mClimateSubtropicalDistributionSouthwest Pacific: Australia.Conservation status (IUCN)Not EvaluatedThreat to humansHarmlessUsesAquarium: commercialResilienceHigh, minimum population doubling time less than 15 months (Preliminary K or Fecundity.) More gobies, blennies & dottybacksYellowhead jawfishOpistognathus aurifronsFire gobyNemateleotris magnificaYellow prawn-gobyCryptocentrus cinctusPersian blennyEcsenius midasEastern blue devilParaplesiops bleekeriBluegill longfinPlesiops corallicolaSee all gobies, blennies & dottybacks SourcesTaxonomy, distribution and biology data: FishBase (Froese, R. and D. Pauly, eds.), licensed CC BY-NC 4.0.Last updated 27 September 2026