
Pretty tetra
A dark wedge below a short golden tail-base mark
A deep silver-grey body carries a lower tail wedge and an orange-red upper iris.
- Adult length
- Up to 3.3 cm (standard length, without the tail fin)
- Water temperature
- 23–27 °C
- pH
- 5.5–7
- Hardness
- 1–12 dGH
- Natural habitat
- Native to the upper Amazon basin.
Avoid much larger or boisterous companions.
Appearance and identification
Compare the wedge with the more concentrated tail spot of the head-and-tail-light tetra. Holopristis haraldi is a separate species.
Same-species behaviour
Keep six or more, preferably ten or more, with shelter and swimming room.
Space requirements
Use a 60 × 38 cm base.
Diet and feeding
Alternate small dry foods with suitable frozen or live foods.
Compatibility limits
Watch for intimidation and predation.
Aquarium environment
Use planted shelter and subdued lighting, leaving open water.
Sources
www.fishbase.se ↗ 2026-10-22
www.seriouslyfish.com ↗ 2026-10-22
researcharchive.calacademy.org ↗ 2026-10-22
kmweb.moa.gov.tw ↗ 2026-10-22
my-fish.org ↗ 2026-10-22
www.seriouslyfish.com ↗ 2026-10-22
researcharchive.calacademy.org ↗ 2026-10-22
