HomeFish encyclopediaRay-finned fishesCharacinsCharacinsCrystal tetra Crystal tetra (Roeboides bouchellei) Scientific name: Roeboides bouchellei Fowler, 1923 The Crystal tetra (Roeboides bouchellei) is a freshwater fish of the family Characidae. In the aquarium it needs water at 21–36°C (70–97°F). Crystal tetra care at a glanceTemperature21–36°C (70–97°F) BiologyTypical of quiet waters in creeks and shorelines of larger rivers where there is low to moderate current. Found in slightly brackish waters at sea level and in waters up to 610 m elevation, though generally more abundant below 200 m. Food consists of fish scales, including those of other characins, cichlid and others, and aquatic insects.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameRoeboides bouchelleiFamilyCharacidae (Characins)OrderCharaciformes (Characins)ClassActinopterygii (Ray-finned fishes)Maximum length8.2EnvironmentFreshwater; benthopelagicClimateSubtropicalDistributionCentral America: Pacific slope rivers from west of the Sona Peninsula, Panama, to Coto River, north through the Parrita-Quepos region of Costa Rica to extreme west of Mexico, and on the Atlantic slope from rivers of Nicaragua (Managu? lake) and Honduras.Conservation status (IUCN)Not EvaluatedThreat to humansHarmlessResilienceHigh, 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