Red Fin Penguin Tetra
Red Fin Penguin Tetra (Thayeria sp. 'Teles Pires') is an attractive aquarium fish from Teles Pires River, Mato Grosso, Brazil (wild-caught locality).
Feeding & Care Tip: Hikari Micro Pellets makes an excellent daily staple. Supplement 2–3× per week with Hikari Frozen or Freeze-Dried Tubifex Worms, Hikari Frozen or Freeze-Dried Baby Brine Shrimp to maintain best condition and color. Feed small amounts 2–3 times daily.
Native to Teles Pires River, Mato Grosso, Brazil (wild-caught locality). In the aquarium, a planted setup with the ideal parameters listed below and stable, clean water produces the best coloration and health.
Keep in groups of at least 8. As with most schooling species, larger groups produce more natural behavior and richer color. See Notes for any important care considerations.
A rewarding addition to the planted aquarium, offering attractive coloration and peaceful nature in a well-managed community setup.
Care & Ideal Parameters
| Difficulty | Easy |
| Temperament | Peaceful — Community |
| Typical Adult Size | 2.5 inches (6.5 cm) |
| Min. Group Size | 8 minimum — larger groups for best schooling display |
| Ideal Temp | 73–81°F (23–27°C) |
| Ideal pH | 6.0–7.0 |
| Ideal GH | 2–10 dGH |
| Ideal KH | 1–6 dKH |
| Staple Food | Hikari Micro Pellets |
| Treat / Supplement | Hikari Frozen or Freeze-Dried Tubifex Worms, Hikari Frozen or Freeze-Dried Baby Brine Shrimp |
| Origin | Teles Pires River, Mato Grosso, Brazil (wild-caught locality) |
| Notes | Locality form from Teles Pires River — vivid red-orange fins distinguish it from standard Penguin Tetras. Wild-caught. Classic Penguin Tetra head-up resting posture retained. |
