HomeFreshwater aquarium fishTetras & characinsRed phantom tetra Red phantom tetra (Hyphessobrycon sweglesi) Scientific name: Hyphessobrycon sweglesi G?ry, 1961 The Red phantom tetra (Hyphessobrycon sweglesi) is a freshwater fish of the family Characidae that grows to about 4 cm (1.6 in). It is easy to keep and peaceful, suits community aquariums and needs a tank of at least 55 L (15 US gal), water at 22–25°C (72–77°F) and a pH of 5.5–7.5. Native range: South America, Orinoco basin of nothern South America. Red phantom tetra care at a glanceCare levelEasyTemperamentPeacefulCommunity tankExcellentAdult size4 cm (1.6 in)Minimum tank55 L (15 US gal)Temperature22–25°C (72–77°F)pH5.5–7.5Hardness4–20 dGH (71–357 ppm)DietOmnivore. Accepts flakes, freeze-dried foods and frozen foods. BiologyFeeds on worms, small insects and crustaceans. Aquarium keeping: in groups of 5 or more individuals; minimum aquarium size 60 cm.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameHyphessobrycon sweglesiFamilyCharacidae (Characins)OrderCharaciformes (Characins)ClassActinopterygii (Ray-finned fishes)Maximum length3.2EnvironmentFreshwater;; pH range: 5.5 - 7.5; dH range: ? - 20 benthopelagicClimateTropicalDistributionSouth America: Orinoco River basin.Conservation status (IUCN)Not EvaluatedThreat to humansHarmlessUsesAquarium: commercialResilienceHigh, minimum population doubling time less than 15 months (Preliminary K or Fecundity.) More tetras & characinsBlack phantom tetraHyphessobrycon megalopterusCongo tetraPhenacogrammus interruptusLemon tetraHyphessobrycon pulchripinnisFlag tetraHyphessobrycon heterorhabdusDiamond tetraMoenkhausia pittieriBlack neon tetraHyphessobrycon herbertaxelrodiSee all tetras & characins Can it live with...?Red phantom tetra and Black neon tetraRed phantom tetra and Black phantom tetraRed phantom tetra and Bleeding-heart tetraRed phantom tetra and Bloodfin tetraRed phantom tetra and Flag tetraRed phantom tetra and Flame tetraRed phantom tetra and Garnet tetraRed phantom tetra and Glowlight tetraRed phantom tetra and Head-and-taillight tetraRed phantom tetra and Lemon tetraRed phantom tetra and Pinktail chalceus SourcesTaxonomy, distribution and biology data: FishBase (Froese, R. and D. Pauly, eds.), licensed CC BY-NC 4.0. Aquarium care parameters compiled, checked and converted to metric and imperial units by Guppies.za.net.Last updated 28 September 2026