HomeFish encyclopediaRay-finned fishesFlatfishesTonguefishesSand tonguefish Sand tonguefish (Cynoglossus capensis) Scientific name: Cynoglossus capensis Kaup, 1858 The Sand tonguefish (Cynoglossus capensis) is a brackish-water fish of the family Cynoglossidae. Native range: Southeast Atlantic, Kunene River, Namibia to Natal, South Africa. BiologyDorsal spines (total): 0; Dorsal soft rays (total): 103-110; Anal spines: 0; Anal soft rays: 81 - 88. Upper side brownish grey, with dark specks.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameCynoglossus capensisFamilyCynoglossidae (Tonguefishes)OrderPleuronectiformes (Flatfishes)ClassActinopterygii (Ray-finned fishes)Maximum length31.0Depth range450 m (1476 ft)EnvironmentMarine; brackish; demersal; depth range ? - 450 m, usually ? - 100 mClimateSubtropicalDistributionSoutheast Atlantic: Kunene River, Namibia to Natal, South Africa.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