Can Oscar Fish Live With Royal Gramma?
❌Not Compatible
Incompatible pH. Oscar Fish needs 6.0–8.0, Royal Gramma needs 8.1–8.4.
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Parameter Comparison
| Parameter | Oscar Fish | Royal Gramma | Overlap |
|---|---|---|---|
| Temperature | 74–81°F | 75–80°F | 75–80°F ✓ |
| pH Range | 6–8 | 8.1–8.4 | No overlap ✗ |
| Temperament | aggressive | peaceful | Aggression risk ✗ |
| Max Size | 14" | 3" | Size mismatch ✗ |
| Min Tank Size | 75 gal | 20 gal | 75 gal minimum together |
| Diet | Carnivore | Carnivore | — |
| Care Level | intermediate | beginner | — |
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 →Royal Gramma
Gramma loreto
beginnerpeaceful20+ gal
The royal gramma is one of the most stunning and beginner-friendly saltwater fish. Its front half is vivid purple transitioning to bright yellow on the back — a color combination unmatched in the marine world. They are hardy, disease-resistant, reef-safe, and stay small. Often considered one of the top 3 beginner saltwater fish alongside clownfish and firefish.
Full care guide →Other Compatible Tank Mates
For Oscar Fish:
For Royal Gramma:
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