Can Fiddler Crab live with Red Claw Crab?
Compatible
Why
No conflicts — these two share similar water needs, temperament, and size, and neither is a threat to the other.
Sweet spot: both do well at 75–82°F and pH 7.5–8.5 — aim there.
Side-by-side
| Fiddler Crab | Red Claw Crab | |
|---|---|---|
| Temperature | 72–82°F | 75–82°F |
| pH | 7.5–8.5 | 7.5–8.5 |
| Hardness (GH) | 15–25 dGH | 15–25 dGH |
| Adult size | 2" | 2.5" |
| Temperament | Peaceful | Semi-aggressive |
| Min tank | 15 gal | 15 gal |
Together, plan on at least 15 gallons.
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 Fiddler Crab, Red Claw Crab →Everything compatible with Fiddler Crab · …with Red Claw Crab