Can Betta (Siamese Fighting Fish) live with Marbled Crayfish?
Caution — with care
Why
- Marbled Crayfish can grab Betta (Siamese Fighting Fish) while it sleeps — only fast mid/top-water fish are reasonably safe.
- Only a narrow temperature overlap — keep both around 76–77°F.
Sweet spot: both do well at 76–77°F and pH 6.5–7.5 — aim there.
Side-by-side
| Betta (Siamese Fighting Fish) | Marbled Crayfish | |
|---|---|---|
| Temperature | 76–82°F | 64–77°F |
| pH | 6–7.5 | 6.5–8 |
| Hardness (GH) | 2–12 dGH | 5–20 dGH |
| Adult size | 2.5" | 5" |
| Temperament | Semi-aggressive | Aggressive |
| Min tank | 5 gal | 30 gal |
Together, plan on at least 30 gallons.
How to make it work
- Keep a large, established shrimp colony in a heavily planted tank with moss and cover so enough survive to breed.
- Only combine with fast, mid/top-water fish and give the tankmates plenty of escape routes.
- Target the overlapping water-parameter range and acclimate slowly.
Sort it with: GH remineraliser · An adjustable heater
Design the whole tank, not just the stocking
Skapelab plans a complete, buildable planted aquarium around your fish — a hand-illustrated layout, the exact plants and hardscape, a placement map, and a full equipment and shopping list. Free.
Design a tank with Betta (Siamese Fighting Fish), Marbled Crayfish →Everything compatible with Betta (Siamese Fighting Fish) · …with Marbled Crayfish