Can Threadfin Butterflyfish live with Yellow Tang?
Case-by-case. Watch group sizes, tank size, and feeding zones.
Why Threadfin Butterflyfish and Yellow Tang Don't Make an Easy Pair
They can coexist, but you need to manage the setup carefully. The temperament combination (peaceful+semi-aggressive) can work, but you will need to watch them at feeding time for the first week.
Threadfin Butterflyfish
Chaetodon auriga
| Adult Size: | 8.0" |
| Temperament: | peaceful |
| Min Tank: | 75 gal |
| Temperature: | 74-82°F |
| pH Range: | 8.1-8.4 |
Yellow Tang
Zebrasoma flavescens
| Adult Size: | 7.0" |
| Temperament: | semi-aggressive |
| Min Tank: | 75 gal |
| Temperature: | 75-80°F |
| pH Range: | 8.1-8.4 |
Water Parameter Overlap
| Parameter | Threadfin Butterflyfish | Yellow Tang | Overlap |
|---|---|---|---|
| Temperature | 74-82°F | 75-80°F | 5°F ✓ |
| pH | 8.1-8.4 | 8.1-8.4 | 0.3 ✓ |
Compatibility Breakdown
Temperament Match: peaceful + semi-aggressive. Semi-aggressive → watch territory and feeding.
Score: 76.0/100 (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 75°F and 80°F.
- pH: maintain 8.1 – 8.4.
- Hiding spots: essential for Threadfin Butterflyfish — 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:
Frozen mysis shrimp for marine butterflyfish
Explore Related Checks
See what else works with these fish:
⚠️ Common Reasons This Pairing Fails in Practice
- Overcrowding: Even compatible species fail in tanks that are too small. Double the species means double the bioload — 25% weekly water changes are the minimum.
- Inadequate acclimation: Adding both species on the same day without quarantine is a common mistake. Always drip-acclimate new arrivals and quarantine for 2–4 weeks.
- Mismatched feeding: Threadfin Butterflyfish is a carnivore while Yellow Tang is a herbivore. Use targeted feeding zones and sinking vs. floating food to ensure both get proper nutrition.
Tools & Resources
Accuracy note: This tool uses expert rules + FishBase.org data. Individual fish behavior varies — a peaceful individual Threadfin Butterflyfish 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.