HomeFish encyclopediaRay-finned fishesPerch-like fishWrassesKnife razorfish Knife razorfish (Cymolutes praetextatus) Scientific name: Cymolutes praetextatus Quoy & Gaimard, 1834 The Knife razorfish (Cymolutes praetextatus) is a marine fish of the family Labridae. Native range: Indo-Pacific, East Africa south to Natal, South Africa and east to the Society Islands. BiologyDorsal spines (total): 9 - 10; Dorsal soft rays (total): 12-13; Anal spines: 2 - 3; Anal soft rays: 11 - 12. Has a broad yellow lateral stripe.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameCymolutes praetextatusFamilyLabridae (Wrasses)OrderPerciformes (Perch-like fish)ClassActinopterygii (Ray-finned fishes)Maximum length20.0Depth range6 m (20 ft)EnvironmentMarine; reef-associated; depth range ? - 6 mClimateTropicalDistributionIndo-Pacific: East Africa south to Natal, South Africa and east to the Society Islands.Conservation status (IUCN)Least Concern (LC)Threat 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