HomeFish encyclopediaRay-finned fishesFlatfishesLarge-tooth floundersLongfin sanddab Longfin sanddab (Citharichthys xanthostigma) Scientific name: Citharichthys xanthostigma Gilbert, 1890 The Longfin sanddab (Citharichthys xanthostigma) is a marine fish of the family Paralichthyidae. Native range: Eastern Pacific, Monterey Bay in California, USA to Costa Rica. BiologyDorsal soft rays (total): 79-89; Anal soft rays: 61 - 69; Vertebrae: 36 - 38Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameCitharichthys xanthostigmaFamilyParalichthyidae (Large-tooth flounders)OrderPleuronectiformes (Flatfishes)ClassActinopterygii (Ray-finned fishes)Maximum length25.0Common length20.0Depth range2–201 m (7–659 ft)EnvironmentMarine; demersal; depth range 2 - 201 mClimateSubtropicalDistributionEastern Pacific: Monterey Bay in California, USA to Costa Rica.Conservation status (IUCN)Not EvaluatedThreat to humansHarmlessUsesFisheries: subsistence fisheriesResilienceHigh, minimum population doubling time less than 15 months (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