Compatibility Overview
Swordtail and Zebra Danio can generally share an aquarium with appropriate planning. Both species prefer overlapping temperature and pH ranges, and neither poses a major aggression risk to the other. A minimum 55-gallon tank is recommended to provide adequate territory and water volume for both species.
| Factor | Swordtail | Zebra Danio | Verdict |
|---|---|---|---|
| Temperature | 65–80°F | 64–82°F | ✅ 65–80°F |
| pH Range | 7.0–8.3 | 6.5–8.0 | ✅ 7.0–8.0 |
| Temperament | peaceful | peaceful | ✅ Compatible |
| Adult Size | 5 in | 2 in | ⚠️ 2.5× difference |
| Min. Group | 3+ | 5+ | See below |
| Min. Tank Size | 55 gallons (for both species) | — | |
✅ Compatibility Positives
⚠️ Caution Points
Species Profiles
Swordtail — Xiphophorus hellerii
Hardy livebearer with a distinctive elongated lower tail fin in males. Peaceful community fish that tolerate a wide temperature range.
Zebra Danio — Danio rerio
Extremely hardy, fast-moving schooling fish tolerant of a wide temperature range. Active top-to-mid swimmers compatible with most community fish.
Frequently Asked Questions
Can Swordtail live with Zebra Danio?
Yes, in a well-planned setup. Swordtail and Zebra Danio can generally share an aquarium with appropriate planning. Both species prefer overlapping temperature and pH ranges, and neither poses a major aggression risk to the other. A minimum 55-gallon tank is recommended to provide adequate territory and water volume for both species.
What tank size do I need for Swordtail and Zebra Danio together?
A minimum of 55 gallons is recommended for keeping Swordtail and Zebra Danio together. A larger tank improves water stability and reduces territorial conflict.
What temperature suits both Swordtail and Zebra Danio?
65–80°F
Is a Swordtail aggressive toward a Zebra Danio?
Swordtail is peaceful and Zebra Danio is peaceful. No major aggression issues are expected between these species.