Can Harlequin Rasbora live with Oscar?
Not recommended
Why
- Oscar’s mouth is big enough to swallow Harlequin Rasbora (only 1.75" long) — it will be eaten.
- Oscar is aggressive and will attack the peaceful Harlequin Rasbora.
Side-by-side
| Harlequin Rasbora | Oscar | |
|---|---|---|
| Temperature | 72–80°F | 74–81°F |
| pH | 6–7.5 | 6–8 |
| Hardness (GH) | 2–12 dGH | 5–20 dGH |
| Adult size | 1.75" | 16" |
| Temperament | Peaceful | Aggressive |
| Min tank | 15 gal | 75 gal |
Together, plan on at least 75 gallons.
Compatible alternatives
Instead of Harlequin Rasbora (to keep Oscar):
- Oscar — 16", aggressive
- Kissing Gourami — 12", semi-aggressive
- Typhoon Pleco — 12", semi-aggressive
Instead of Oscar (to keep Harlequin Rasbora):
- Kissing Gourami — 12", semi-aggressive
- Sparkling Gourami — 1.5", peaceful buy at The Shrimp Farm · The Shrimp Farm live-arrival guarantee
- Pygmy Cory — 1", peaceful
Where to buy
- Harlequin Rasbora: buy at The Shrimp Farm · The Shrimp Farm live-arrival guarantee
Live-animal shipping: add a heat pack below 50°F, expect weather holds above 90°F, and schedule delivery for a moderate week when someone can receive it promptly.
Design the whole tank, not just the stocking
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Design a tank with Harlequin Rasbora, Oscar →Everything compatible with Harlequin Rasbora · …with Oscar