Lemon Tetra and Oscar Compatibility Overview
Lemon Tetra and Oscar are generally not recommended to be housed together. The adult size gap creates a meaningful predation risk. Lemon Tetra is peaceful and Oscar is aggressive. Expect chasing and fin damage unless the tank is oversized, heavily planted, and watched closely. Review the behavior and water details before deciding whether to attempt the pairing.
| Factor | Lemon Tetra | Oscar | Verdict |
|---|---|---|---|
| Temperature | 68โ82ยฐF | 74โ81ยฐF | โ 74โ81ยฐF |
| pH Range | 5.0โ7.5 | 6.0โ8.0 | โ 6.0โ7.5 |
| Temperament | peaceful | aggressive | โ Risk |
| Adult Size | 1.6 in | 14 in | โ 9ร difference |
| Min. Group | 8+ | 1+ | See below |
| Min. Tank Size | 100 gallons (for both species) | โ | |
Compatibility Positives
Incompatibility Reasons
Species Profiles
Lemon Tetra โ Hyphessobrycon pulchripinnis
The Lemon Tetra is a vibrant, peaceful addition to freshwater tanks. Known for its striking yellow and red colors, it is well-suited for community tanks. They are active swimmers and thrive in groups. Maintaining stable water conditions is key to their health.
โ Full Lemon Tetra care guide
Oscar โ Astronotus ocellatus
Intelligent but aggressive cichlids that will eat any fish small enough to fit in their mouth. Require large tanks (75+ gallons) and robust tank mates.
Frequently Asked Questions
Can Lemon Tetra live with Oscar?
Generally not recommended. Lemon Tetra and Oscar are generally not recommended to be housed together. The adult size gap creates a meaningful predation risk. Lemon Tetra is peaceful and Oscar is aggressive. Expect chasing and fin damage unless the tank is oversized, heavily planted, and watched closely. Review the behavior and water details before deciding whether to attempt the pairing.
What tank size do I need for Lemon Tetra and Oscar together?
A minimum of 100 gallons is recommended for keeping Lemon Tetra and Oscar together. A larger tank improves water stability and reduces territorial conflict.
What temperature suits both Lemon Tetra and Oscar?
74โ81ยฐF โ inside Lemon Tetra's 68โ82ยฐF and Oscar's 74โ81ยฐF.
Is a Lemon Tetra aggressive toward a Oscar?
The adult size gap creates a meaningful predation risk.
Related Compatibility Guides
Tank Size for Lemon Tetra and Oscar
Use the scenario that matches the actual group sizes and temperament you plan to keep.
| Scenario | Tank | When it applies |
|---|---|---|
| Minimum viable | 100 gal | Only for the recommended minimum groups, mature filtration, and close monitoring. |
| Recommended community | 150 gal | Adds territory, swimming room, and a safer buffer for behavior. |
| Low-conflict setup | 220 gal | Best when keeping larger schools or reducing territorial pressure. |