Compatibility
Betta × Freshwater Angelfish Compatibility
Compatibility calculated based on predation risk, behaviour profile, and water-parameter overlap.
Betta and Freshwater Angelfish are not recommended together in most community setups, but territorial behaviour should be monitored and size difference should be monitored.
TemperatureA
pHA
HardnessA
FlowA
PredationB
BehaviourC
Not recommendedC
Envrionmental Factors
Temperature overlap
Betta: 24.0–30.0 °C
Freshwater Angelfish: 24.0–30.0 °C
Shared window: 24.0–30.0°C.
pH overlap
Betta: 6.0–7.5
Freshwater Angelfish: 6.8–7.8
Shared window: 6.8–7.5.
Hardness overlap
Betta: Very soft → Medium
Freshwater Angelfish: Soft → Medium
Shared hardness bands: 2 (overlap ratio 100%).
Flow match
Betta: Low
Freshwater Angelfish: Medium
Flow preferences do not conflict directly (no low-vs-high clash).
Behavioural Factors
Predation risk (size ratio)
Adult size ratio: 2.00x
Size gap is between 2.0x and 3.0x, so monitor for dominance and mouth-fit risk.
Behaviour risk
- - Betta: Territorial.
- - Freshwater Angelfish: Territorial.
- - Freshwater Angelfish: Predatory.
- - Both species show territorial or semi-aggressive behaviour; conflicts are likely.
Parameter snapshot
| Parameter | Betta | Freshwater Angelfish |
|---|---|---|
| Adult size | 6.0 cm | 12.0 cm |
| Temperature | 24.0–30.0 °C | 24.0–30.0 °C |
| pH | 6.0–7.5 | 6.8–7.8 |
| Hardness | Very soft → Medium | Soft → Medium |
| Flow | Low | Medium |
| Locations | Cambodia, Thailand | South America |
Geographic overlap (supporting signal)
No recorded overlap in our dataset.