Compatibility Overview
Keyhole Cichlid and Percula Clownfish are generally not recommended to be housed together. The issues listed above — whether water parameter incompatibility, predation risk, or aggression — create conditions where one or both fish are likely to suffer harm or chronic stress.
| Factor | Keyhole Cichlid | Percula Clownfish | Verdict |
|---|---|---|---|
| Temperature | 72–79°F | 75–82°F | ✅ 75–79°F |
| pH Range | 7.0–8.0 | 8.0–8.5 | ⚠️ 8.0–8.0 (narrow) |
| Temperament | semi | semi | ⚠️ Monitor |
| Adult Size | 2.0 in | 3.1 in | ✅ Similar |
| Min. Group | 1+ | 1+ | See below |
| Min. Tank Size | 29 gallons (for both species) | — | |
✅ Compatibility Positives
❌ Incompatibility Reasons
Species Profiles
Keyhole Cichlid — Aquarium species
The Keyhole Cichlid is a popular choice for beginners due to its relatively easy care and peaceful temperament. These fish are known for their distinct keyhole marking and vibrant coloration. They do well in a community tank with other peaceful species, but should be provided with plenty of hiding spots to feel secure. With proper care, they can live for sev
→ Full Keyhole Cichlid care guide
Percula Clownfish — Aquarium species
The Percula Clownfish, also known as the False Percula, is a popular beginner fish due to its hardiness and striking coloration. These fish are best kept in a saltwater tank with a minimum size of 30 gallons and compatible tankmates. They are peaceful, non-aggressive and do well in groups with other compatible species. Regular water quality maintenance is es
Frequently Asked Questions
Can Keyhole Cichlid live with Percula Clownfish?
Generally not recommended. Keyhole Cichlid and Percula Clownfish are generally not recommended to be housed together. The issues listed above — whether water parameter incompatibility, predation risk, or aggression — create conditions where one or both fish are likely to suffer harm or chronic stress.
What tank size do I need for Keyhole Cichlid and Percula Clownfish together?
A minimum of 29 gallons is recommended for keeping Keyhole Cichlid and Percula Clownfish together. A larger tank improves water stability and reduces territorial conflict.
What temperature suits both Keyhole Cichlid and Percula Clownfish?
75–79°F
Is a Keyhole Cichlid aggressive toward a Percula Clownfish?
Keyhole Cichlid is semi and Percula Clownfish is semi. These animals require different water types and cannot share one aquarium.
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 | 57/100 |
| Ph | 0/100 |
| Temperament | 62/100 |
| 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 | 29 gal | Only for the recommended minimum groups, mature filtration, and close monitoring. |
| Recommended community | 40 gal | Adds territory, swimming room, and a safer buffer for behavior. |
| Low-conflict setup | 55 gal | Best when keeping larger schools or reducing territorial pressure. |