Can Cajun Dwarf Crayfish live with Fiddler Crab?
Light caution
Why
- Only a narrow water hardness overlap — keep both around 15–15 dGH.
Sweet spot: both do well at 72–75°F and pH 7.5–8 — aim there.
Side-by-side
| Cajun Dwarf Crayfish | Fiddler Crab | |
|---|---|---|
| Temperature | 65–75°F | 72–82°F |
| pH | 6.5–8 | 7.5–8.5 |
| Hardness (GH) | 5–15 dGH | 15–25 dGH |
| Adult size | 1.5" | 2" |
| Temperament | Peaceful | Peaceful |
| Min tank | 10 gal | 15 gal |
Together, plan on at least 15 gallons.
How to make it work
- Target the overlapping water-parameter range and acclimate slowly.
Sort it with: GH remineraliser
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 Cajun Dwarf Crayfish, Fiddler Crab →Everything compatible with Cajun Dwarf Crayfish · …with Fiddler Crab