Can Harlequin Rasbora Live With Oscar Fish?
❌Not Compatible
Oscar Fish is aggressive and will likely attack or stress tank mates.
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Parameter Comparison
| Parameter | Harlequin Rasbora | Oscar Fish | Overlap |
|---|---|---|---|
| Temperature | 73–82°F | 74–81°F | 74–81°F ✓ |
| pH Range | 6–7.5 | 6–8 | 6–7.5 ✓ |
| Temperament | peaceful | aggressive | Aggression risk ✗ |
| Max Size | 2" | 14" | Size mismatch ✗ |
| Min Tank Size | 10 gal | 75 gal | 75 gal minimum together |
| Diet | Omnivore | Carnivore | — |
| Care Level | beginner | intermediate | — |
Species Profiles
Harlequin Rasbora
Trigonostigma heteromorpha
beginnerpeaceful10+ gal
Harlequin rasboras are elegant, copper-colored schooling fish with a distinctive black triangular patch on their body. They are one of the most peaceful and hardy community fish available, making them ideal for beginners. In schools of 8+, they display beautiful coordinated swimming behavior.
Full care guide →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 →Other Compatible Tank Mates
For Harlequin Rasbora:
For Oscar Fish:
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