Compatibility Overview
Peacock Cichlid and Zebra Danio can potentially coexist, but the combination requires careful attention. Some combination of water parameter differences, size mismatch, or temperament issues make this pair challenging. A larger tank (minimum 40 gallons), dense planting, and close monitoring are essential.
| Factor | Peacock Cichlid | Zebra Danio | Verdict |
|---|---|---|---|
| Temperature | 75–81°F | 64–82°F | ✅ 75–81°F |
| pH Range | 7.5–8.5 | 6.5–8.0 | ⚠️ 7.5–8.0 (narrow) |
| Temperament | aggressive | peaceful | ❌ Risk |
| Adult Size | 3.1 in | 2 in | ✅ Similar |
| Min. Group | 1+ | 5+ | See below |
| Min. Tank Size | 40 gallons (for both species) | — | |
✅ Compatibility Positives
⚠️ Caution Points
Species Profiles
Peacock Cichlid — Aquarium species
The Peacock Cichlid, Aulonocara nyassae, is a stunning fish with vibrant blue and yellow colors. These fish are known for their aggression and require a mature and well-maintained tank. They are best kept in pairs or in a species-specific tank. Careful attention must be given to water parameters and tank setup to ensure their health and well-being.
→ Full Peacock Cichlid care guide
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 Peacock Cichlid live with Zebra Danio?
With significant caution and a larger tank. Peacock Cichlid and Zebra Danio can potentially coexist, but the combination requires careful attention. Some combination of water parameter differences, size mismatch, or temperament issues make this pair challenging. A larger tank (minimum 40 gallons), dense planting, and close monitoring are essential.
What tank size do I need for Peacock Cichlid and Zebra Danio together?
A minimum of 40 gallons is recommended for keeping Peacock Cichlid and Zebra Danio together. A larger tank improves water stability and reduces territorial conflict.
What temperature suits both Peacock Cichlid and Zebra Danio?
75–81°F
Is a Peacock Cichlid aggressive toward a Zebra Danio?
Peacock Cichlid is aggressive and Zebra Danio is peaceful. No major aggression issues are expected between these species.
Related Compatibility Guides
Compatibility score breakdown
The overall score is weighted across water chemistry, behavior, adult size, swimming zone, and social needs. A score is a planning aid—not a guarantee for individual fish.
| Factor | Score |
|---|---|
| Temperature | 100/100 |
| Ph | 50/100 |
| Temperament | 30/100 |
| Adult Size | 100/100 |
| Swim Zone | 68/100 |
| Social Needs | 92/100 |
Tank size scenarios
Use the scenario that matches the actual group sizes and temperament you plan to keep.
| Scenario | Tank | When it applies |
|---|---|---|
| Minimum viable | 40 gal | Only for the recommended minimum groups, mature filtration, and close monitoring. |
| Recommended community | 55 gal | Adds territory, swimming room, and a safer buffer for behavior. |
| Low-conflict setup | 90 gal | Best when keeping larger schools or reducing territorial pressure. |