Can Cherry Shrimp live with Lawnmower Blenny?
High risk due to water mismatch, aggression, or predation.
Why Cherry Shrimp and Lawnmower Blenny Don't Make an Easy Pair
The size gap is 3.8" — Cherry Shrimp (1.2") and Lawnmower Blenny (5.0"). A fish that fits in another fish's mouth will eventually end up there.
Cherry Shrimp
Neocaridina davidi
| Adult Size: | 1.2" |
| Temperament: | peaceful |
| Min Tank: | 5 gal |
| Temperature: | 64-76°F |
| pH Range: | 6.5-7.5 |
Lawnmower Blenny
Salarias fasciatus
| Adult Size: | 5.0" |
| Temperament: | peaceful |
| Min Tank: | 30 gal |
| Temperature: | 74-82°F |
| pH Range: | 8.1-8.4 |
Water Parameter Overlap
| Parameter | Cherry Shrimp | Lawnmower Blenny | Overlap |
|---|---|---|---|
| Temperature | 64-76°F | 74-82°F | 2°F ✓ |
| pH | 6.5-7.5 | 8.1-8.4 | No overlap ✗ |
Compatibility Breakdown
Temperament Match: peaceful + peaceful. Both peaceful → minimal conflict.
⚠️ Size Predation Risk: Cherry Shrimp (1.2") vs Lawnmower Blenny (5.0"). A 3.8" gap — the larger fish will view the smaller fish as food.
Score: 20/100 (GOOD ≥80, CAUTION ≥50, RISKY <50).
🔧 Tank Setup Requirements (for Both)
- Minimum tank: 30 gallons — sized for the larger fish in the pair.
- Temperature: keep it between 74°F and 76°F.
- pH: no shared range. One species will be outside its tolerance regardless of what you set.
- Hiding spots: essential for Cherry Shrimp — caves, plants, or driftwood to retreat when feeling stressed.
- Water changes: 25% weekly minimum. Two species mean double the bioload.
🔧 Tank Stocking Calculator
Enter tank size to calculate safe stocking levels:
Recommended Equipment
Based on tank size 30+ gallons:
Dried seaweed sheets for marine herbivores
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Accuracy note: This tool uses expert rules + FishBase.org data. Individual fish behavior varies — a peaceful individual Cherry Shrimp may act differently from its species average. Always observe, quarantine new arrivals for 2-4 weeks, and avoid overcrowding. If a pairing says CAUTION, start with a smaller group and a lid.