HomeFish encyclopediaRay-finned fishesPerch-like fishSea chubsRock blackfish Rock blackfish (Girella tephraeops) Scientific name: Girella tephraeops Richardson, 1846 The Rock blackfish (Girella tephraeops) is a marine fish of the family Kyphosidae. Native range: Eastern Indian Ocean, Western Australia. BiologyDorsal spines (total): 13 - 14; Dorsal soft rays (total): 13; Anal spines: 3; Anal soft rays: 11. Uniformly dark gray or with uneven pattern of mixed, variably pale to dark, irregular spots; fins dark.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameGirella tephraeopsFamilyKyphosidae (Sea chubs)OrderPerciformes (Perch-like fish)ClassActinopterygii (Ray-finned fishes)Maximum length61.0Depth range20 m (66 ft)EnvironmentMarine; reef-associated; depth range ? - 20 mClimateSubtropicalDistributionEastern Indian Ocean: Western Australia.Conservation status (IUCN)Not EvaluatedThreat to humansHarmlessResilienceLow, minimum population doubling time 4.5 - 14 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