Can Betta mahachaiensis Live With Oscar?

Betta mahachaiensis and Oscar are NOT compatible tank mates.

Detailed Analysis

Temperature ✓ Compatible

Good temperature overlap at 75–81°F.

pH ✓ Compatible

Good pH overlap at 6.5–7.5.

Size ✗ Not Compatible

Extreme size difference. Oscar (14") may eat or bully Betta mahachaiensis (2").

Temperament ✗ Not Compatible

Betta mahachaiensis (semi-aggressive) is not compatible with Oscar (aggressive). Aggression or stress is very likely.

Swim Level ✓ Compatible

Fish occupy different water levels (Betta mahachaiensis: top, Oscar: middle), reducing conflict.

Trait Conflict ✗ Not Compatible

Oscar is a predator and may eat Betta mahachaiensis.

Trait Conflict ⚠ Use Caution

Betta mahachaiensis may prefer brackish water conditions, which Oscar cannot tolerate long-term.

Tank Requirements

Minimum tank size for this combination: 75 gallons

ParameterBetta mahachaiensisOscar
Temperature75–82°F74–81°F
pH6.5–86–7.5
Max Size2"14"
TemperamentSemi-aggressiveAggressive
Swim LevelTopMiddle
Min Tank5 gal75 gal

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