Longfin Neon Tetra
Longfin Neon Tetra
Longfin Neon Tetra (Paracheirodon innesi longfin) is the longfin mutation of the classic Neon Tetra — the same brilliant blue-green iridescent stripe and vivid red belly, combined with dramatically extended flowing fin rays. The iridescent stripe is produced by guanine crystals and shifts from blue-green to indigo in darkness. The flowing fins billow gracefully with each movement.
Feeding & Care Tip: Hikari Micro Pellets (crushed or soaked briefly) and Sera Vipan Baby make excellent daily staples. Supplement 2–3× per week with Hikari Frozen or Freeze-Dried Baby Brine Shrimp and Hikari Frozen Daphnia. Feed small amounts 2–3 times daily in a calm environment.
The longfin mutation is a captive-developed aquarium strain. All other characteristics are identical to the standard Neon Tetra. Extended fins require clean water and very gentle filtration — strong currents gradually damage the fin rays. Fin-nipping tankmates are absolutely incompatible.
Soft, slightly acidic water enhances coloration. The longfin form does not occur in the wild — a purely aquarium development.
Keep in groups of at least 10. The longfin mutation makes an already beautiful fish spectacular in a planted aquarium with gentle flow. Avoid all fin-nippers.
Care & Ideal Parameters
| Difficulty | Easy |
| Temperament | Peaceful — avoid fin-nippers |
| Typical Adult Size | 1.5 inches (3.8 cm) |
| Min. Group Size | 10 minimum |
| Ideal Temp | 70–81°F (21–27°C) |
| Ideal pH | 6.0–7.5 |
| Ideal GH | 1–10 dGH |
| Ideal KH | 0–5 dKH |
| Staple Food | Hikari Micro Pellets (crushed/soaked); Sera Vipan Baby |
| Treat / Supplement | Hikari Frozen or Freeze-Dried Baby Brine Shrimp; Hikari Frozen Daphnia |
| Origin | Captive-bred longfin strain (wild ancestry western Amazon) |
| Notes | Longfin mutation — extended flowing fins. Gentle flow essential. No fin-nippers. Same guanine crystal stripe as standard Neon Tetra. |
