Can Oscar Fish Live With Cardinal Tetra?
❌Not Compatible
Oscar Fish is aggressive and will likely attack or stress tank mates.
Ad
Parameter Comparison
| Parameter | Oscar Fish | Cardinal Tetra | Overlap |
|---|---|---|---|
| Temperature | 74–81°F | 73–81°F | 74–81°F ✓ |
| pH Range | 6–8 | 4.5–7 | 6–7 ✓ |
| Temperament | aggressive | peaceful | Aggression risk ✗ |
| Max Size | 14" | 2" | Size mismatch ✗ |
| Min Tank Size | 75 gal | 10 gal | 75 gal minimum together |
| Diet | Carnivore | Omnivore | — |
| Care Level | intermediate | intermediate | — |
Species Profiles
Oscar Fish
Astronotus ocellatus
intermediateaggressive75+ gal
Oscars are large, intelligent South American cichlids often called 'water dogs' for their interactive personality. They recognize their owners, beg for food, and can be hand-fed. However, they grow fast, produce massive waste, and need at least a 75-gallon tank.
Full care guide →Cardinal Tetra
Paracheirodon axelrodi
intermediatepeaceful10+ gal
Cardinal tetras look similar to neon tetras but have a red stripe that extends the entire length of their body (vs only the back half in neons). They prefer softer, more acidic water and are slightly more delicate, but their deeper coloration makes them highly sought after.
Full care guide →Other Compatible Tank Mates
For Oscar Fish:
For Cardinal Tetra:
Ad