Can Thai Devil Crab live with Oscar?
Caution — with care
Why
- Thai Devil Crab can grab Oscar while it sleeps — only fast mid/top-water fish are reasonably safe.
Sweet spot: both do well at 75–81°F and pH 7.5–8 — aim there.
Side-by-side
| Thai Devil Crab | Oscar | |
|---|---|---|
| Temperature | 75–84°F | 74–81°F |
| pH | 7.5–8.5 | 6–8 |
| Hardness (GH) | 8–18 dGH | 5–20 dGH |
| Adult size | 2" | 16" |
| Temperament | Semi-aggressive | Aggressive |
| Min tank | 20 gal | 75 gal |
Together, plan on at least 75 gallons.
How to make it work
- Only combine with fast, mid/top-water fish and give the tankmates plenty of escape routes.
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 Thai Devil Crab, Oscar →Everything compatible with Thai Devil Crab · …with Oscar