Can Corydoras Catfish live with Foxface Rabbitfish?
High risk due to water mismatch, aggression, or predation.
Why Corydoras Catfish and Foxface Rabbitfish Don't Make an Easy Pair
The size gap is 6.2" — Corydoras Catfish (2.8") and Foxface Rabbitfish (9.0"). A fish that fits in another fish's mouth will eventually end up there.
Corydoras Catfish
Corydoras aeneus
| Adult Size: | 2.8" |
| Temperament: | peaceful |
| Min Tank: | 20 gal |
| Temperature: | 72-78°F |
| pH Range: | 6.0-7.5 |
Foxface Rabbitfish
Siganus vulpinus
| Adult Size: | 9.0" |
| Temperament: | peaceful |
| Min Tank: | 75 gal |
| Temperature: | 74-82°F |
| pH Range: | 8.1-8.4 |
Water Parameter Overlap
| Parameter | Corydoras Catfish | Foxface Rabbitfish | Overlap |
|---|---|---|---|
| Temperature | 72-78°F | 74-82°F | 4°F ✓ |
| pH | 6.0-7.5 | 8.1-8.4 | No overlap ✗ |
Compatibility Breakdown
Temperament Match: peaceful + peaceful. Both peaceful → minimal conflict.
⚠️ Size Predation Risk: Corydoras Catfish (2.8") vs Foxface Rabbitfish (9.0"). A 6.2" gap — the larger fish will view the smaller fish as food.
Score: 40/100 (GOOD ≥80, CAUTION ≥50, RISKY <50).
🔧 Tank Setup Requirements (for Both)
- Minimum tank: 75 gallons — sized for the larger fish in the pair.
- Temperature: keep it between 74°F and 78°F.
- pH: no shared range. One species will be outside its tolerance regardless of what you set.
- Hiding spots: essential for Corydoras Catfish — 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 75+ gallons:
Dried seaweed sheets for marine herbivores
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Accuracy note: This tool uses expert rules + FishBase.org data. Individual fish behavior varies — a peaceful individual Corydoras Catfish 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.