HomeFish encyclopediaRay-finned fishesPerch-like fishRoversCape bonnetmouth Cape bonnetmouth (Emmelichthys nitidus nitidus) Scientific name: Emmelichthys nitidus nitidus Richardson, 1845 The Cape bonnetmouth (Emmelichthys nitidus nitidus) is a marine fish of the family Emmelichthyidae. BiologyDorsal spines (total): 13; Dorsal soft rays (total): 9-11; Anal spines: 3; Anal soft rays: 10. Reddish, darker (bluish grey) dorsally, silvery white below.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameEmmelichthys nitidus nitidusFamilyEmmelichthyidae (Rovers)OrderPerciformes (Perch-like fish)ClassActinopterygii (Ray-finned fishes)Maximum length50.0Depth range86–500 m (282–1640 ft)EnvironmentMarine; bathydemersal; depth range 86 - 500 mClimateDeep-waterDistributionIndo-Pacific: off western Cape coast in south Africa, Australia, New Zealand, St. Paul and Amsterdam islands. Emmelichthys nitidus cyanescens is found in the eastern Pacific.Conservation status (IUCN)Not EvaluatedThreat to humansHarmlessUsesFisheries: minor commercialResilienceMedium, minimum population doubling time 1.4 - 4.4 years (Assuming tmax > 3) SourcesTaxonomy, distribution and biology data: FishBase (Froese, R. and D. Pauly, eds.), licensed CC BY-NC 4.0.Last updated 27 September 2026