Can Harlequin Rasbora live with Marbled Crayfish?
Caution — with care
Why
- Marbled Crayfish can grab Harlequin Rasbora while it sleeps — only fast mid/top-water fish are reasonably safe.
Sweet spot: both do well at 72–77°F and pH 6.5–7.5 — aim there.
Side-by-side
| Harlequin Rasbora | Marbled Crayfish | |
|---|---|---|
| Temperature | 72–80°F | 64–77°F |
| pH | 6–7.5 | 6.5–8 |
| Hardness (GH) | 2–12 dGH | 5–20 dGH |
| Adult size | 1.75" | 5" |
| Temperament | Peaceful | Aggressive |
| Min tank | 15 gal | 30 gal |
Together, plan on at least 30 gallons.
How to make it work
- Only combine with fast, mid/top-water fish and give the tankmates plenty of escape routes.
Where to buy
- Harlequin Rasbora: buy at Flip Aquatics · Flip Aquatics live-arrival guarantee
- Marbled Crayfish: buy at Flip Aquatics · Flip Aquatics 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.
Build a full tank around this stocking →Everything compatible with Harlequin Rasbora · …with Marbled Crayfish