Can Oscar Fish Live With Swordtail?
❌Not Compatible
Oscar Fish is aggressive and will likely attack or stress tank mates.
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Parameter Comparison
| Parameter | Oscar Fish | Swordtail | Overlap |
|---|---|---|---|
| Temperature | 74–81°F | 72–82°F | 74–81°F ✓ |
| pH Range | 6–8 | 7–8.4 | 7–8 ✓ |
| Temperament | aggressive | peaceful | Aggression risk ✗ |
| Max Size | 14" | 5.5" | Similar ✓ |
| Min Tank Size | 75 gal | 20 gal | 75 gal minimum together |
| Diet | Carnivore | Omnivore | — |
| 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 →Swordtail
Xiphophorus hellerii
beginnerpeaceful20+ gal
Swordtails are hardy, colorful livebearers named for the distinctive elongated lower tail fin (the 'sword') found on males. They come in many color varieties including red, pineapple, marigold, and tuxedo. Larger than guppies but just as easy to care for, swordtails are excellent community fish that prefer hard, alkaline water.
Full care guide →Other Compatible Tank Mates
For Oscar Fish:
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