Can Bichir live with Neon Tetra?
High risk due to water mismatch, aggression, or predation.
Why Bichir and Neon Tetra Don't Make an Easy Pair
The size gap is 10.8" — Bichir (12.0") and Neon Tetra (1.2"). A fish that fits in another fish's mouth will eventually end up there.
Bichir
Polypterus senegalus
| Adult Size: | 12.0" |
| Temperament: | semi-aggressive |
| Min Tank: | 55 gal |
| Temperature: | 75-82°F |
| pH Range: | 6.5-7.5 |
Neon Tetra
Paracheirodon innesi
| Adult Size: | 1.2" |
| Temperament: | peaceful |
| Min Tank: | 10 gal |
| Temperature: | 68-77°F |
| pH Range: | 5.5-7.0 |
Water Parameter Overlap
| Parameter | Bichir | Neon Tetra | Overlap |
|---|---|---|---|
| Temperature | 75-82°F | 68-77°F | 2°F ✓ |
| pH | 6.5-7.5 | 5.5-7.0 | 0.5 ✓ |
Compatibility Breakdown
Temperament Match: semi-aggressive + peaceful. Semi-aggressive → watch territory and feeding.
⚠️ Size Predation Risk: Bichir (12.0") vs Neon Tetra (1.2"). A 10.8" gap — the larger fish will view the smaller fish as food.
⚠️ Diet Conflict: A carnivore sharing water with a fish small enough to fit in its mouth is a waiting game. Feed generously, but the risk is structural — not something you can manage meal by meal.
Score: 20.0/100 (GOOD ≥80, CAUTION ≥50, RISKY <50).
🔧 Tank Setup Requirements (for Both)
- Minimum tank: 55 gallons — sized for the larger fish in the pair.
- Temperature: keep it between 75°F and 77°F.
- pH: maintain 6.5 – 7.0.
- Hiding spots: essential for Bichir — caves, plants, or driftwood to retreat when feeling stressed.
- Water changes: 25% weekly minimum. Two species mean double the bioload.
🔧 Tank Stocking Calculator
Enter tank size to calculate safe stocking levels:
Recommended Equipment
Based on tank size 55+ gallons:
Sinking carnivore pellets for bichir
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Accuracy note: This tool uses expert rules + FishBase.org data. Individual fish behavior varies — a semi-aggressive individual Bichir may act differently from its species average. Always observe, quarantine new arrivals for 2-4 weeks, and avoid overcrowding. If a pairing says CAUTION, start with a smaller group and a lid.