Compatibility Overview
Foxface Rabbitfish and Silver Dollar 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 | Foxface Rabbitfish | Silver Dollar | Verdict |
|---|---|---|---|
| Temperature | 73–81°F | 72–79°F | ✅ 73–79°F |
| pH Range | 8.0–8.3 | 6.0–7.0 | ❌ No overlap |
| Temperament | semi | semi | ⚠️ Monitor |
| Adult Size | 3.9 in | 7.9 in | ⚠️ 2.0× difference |
| Min. Group | 1+ | 1+ | See below |
| Min. Tank Size | 75 gallons (for both species) | — | |
✅ Compatibility Positives
❌ Incompatibility Reasons
Species Profiles
Foxface Rabbitfish — Aquarium species
The Foxface Rabbitfish is a vibrant and peaceful addition to the marine aquarium. With its striking yellow coloration and dark spots, it adds a splash of color to the tank. They are known for their gregarious nature and can be kept in groups of 2-3. This species is suitable for beginners and intermediate aquarists.
→ Full Foxface Rabbitfish care guide
Silver Dollar — Aquarium species
The Metynnis argenteus, known as the Silver Dollar fish, is a popular freshwater species with a distinctive silver color and disc-shaped body. They require a spacious tank and are best kept in groups to prevent bullying. Their peaceful nature makes them suitable for community tanks, but they are not known to school. They thrive in a well-maintained environme
Frequently Asked Questions
Can Foxface Rabbitfish live with Silver Dollar?
Generally not recommended. Foxface Rabbitfish and Silver Dollar 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 Foxface Rabbitfish and Silver Dollar together?
A minimum of 75 gallons is recommended for keeping Foxface Rabbitfish and Silver Dollar together. A larger tank improves water stability and reduces territorial conflict.
What temperature suits both Foxface Rabbitfish and Silver Dollar?
73–79°F
Is a Foxface Rabbitfish aggressive toward a Silver Dollar?
Foxface Rabbitfish is semi and Silver Dollar 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 | 86/100 |
| Ph | 0/100 |
| Temperament | 62/100 |
| Adult Size | 72/100 |
| 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 | 75 gal | Only for the recommended minimum groups, mature filtration, and close monitoring. |
| Recommended community | 125 gal | Adds territory, swimming room, and a safer buffer for behavior. |
| Low-conflict setup | 150 gal | Best when keeping larger schools or reducing territorial pressure. |