Crystal Red Tetra
Hyphessobrycon haraldschultzi
A rare Araguaia gem that rewards patient schooling setups with vivid red coloring.

About
The crystal red tetra (Hyphessobrycon haraldschultzi) is a small characid from the Araguaia River basin in South America, where it inhabits the soft, acidic waters typical of that region. It belongs to what hobbyists sometimes call the 'flag tetras'. A loose grouping of Hyphessobrycon species sharing a distinctive dark blotch on the dorsal fin, often framed by contrasting pale or yellowish markings. In this species, that dorsal marking is relatively compact, bordered above by a white patch and below by a yellowish band, which helps separate it from close relatives like H. eques. The body itself carries the pinkish-to-red coloration characteristic of the broader rosy tetra group. In the aquarium this species is a peaceful, mid-water schooler that really shows its best behavior in groups of eight or more. It fits well into a community alongside similarly scaled characins, smaller catfishes, and non-aggressive cichlids. One thing to know going in: it turns up in the trade only occasionally, often as an accidental inclusion in shipments of other tetras, so when you find it, it's worth grabbing a proper group. Breeding is achievable for intermediate keepers willing to set up a dedicated spawning tank with dim lighting and egg protection, as adults scatter eggs freely and show no parental instinct whatsoever.
Similar species
Other fish you might consider
Good tank mates
Species that tend to coexist peacefully with Crystal Red Tetra
From the same region
Share the same natural habitat. Great for a biotope-themed tank
Frequently asked questions
- How big does the Crystal Red Tetra get?
- The Crystal Red Tetra reaches about 0.5–1.5" as an adult.
- What size tank does the Crystal Red Tetra need?
- A minimum of 14 gallons is recommended for the Crystal Red Tetra, with more room needed for a proper group.
- What water parameters does the Crystal Red Tetra need?
- The Crystal Red Tetra does best with a temperature of 68–82°F, a pH of 5–7, hardness around 1–12 dGH.
- Is the Crystal Red Tetra aggressive?
- The Crystal Red Tetra is generally peaceful and suits a community tank with similarly calm tankmates.
- What does the Crystal Red Tetra eat?
- The Crystal Red Tetra is an omnivore. It does well on a varied diet of quality flake or pellet plus occasional frozen or live foods.
- How long does the Crystal Red Tetra live?
- With good care, the Crystal Red Tetra typically lives 3-8 years.