Can Electric Blue Crayfish live with Yucatan Molly?
Caution — with care
Why
- Electric Blue Crayfish can grab Yucatan Molly while it sleeps — only fast mid/top-water fish are reasonably safe.
- Only a narrow water hardness overlap — keep both around 15 dGH.
Sweet spot: both do well at 72–77°F and pH 7.5–8 — aim there.
Side-by-side
| Electric Blue Crayfish | Yucatan Molly | |
|---|---|---|
| Temperature | 65–77°F | 72–82°F |
| pH | 6.5–8 | 7.5–8.5 |
| Hardness (GH) | 5–15 dGH | 15–30 dGH |
| Adult size | 5" | 6" |
| Temperament | Aggressive | Peaceful |
| Min tank | 30 gal | 40 gal |
Together, plan on at least 40 gallons.
How to make it work
- 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 → Aquarium Co-Op
Where to buy
- Electric Blue Crayfish: buy at Flip Aquatics · Flip Aquatics live-arrival guarantee
- Yucatan Molly: 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 Electric Blue Crayfish · …with Yucatan Molly