Compatibility Overview
Guppy and Pea Puffer are generally not recommended to be housed together. The issues listed above — whether water parameter incompatibility, predation risk, or aggression — create conditions where one or both fish are likely to suffer harm or chronic stress.
| Factor | Guppy | Pea Puffer | Verdict |
|---|---|---|---|
| Temperature | 72–82°F | 74–82°F | ✅ 74–82°F |
| pH Range | 6.8–8.5 | 7.0–8.0 | ✅ 7.0–8.0 |
| Temperament | peaceful | semi | ⚠️ Monitor |
| Adult Size | 2.5 in | 1 in | ⚠️ 2.5× difference |
| Min. Group | 3+ | 1+ | See below |
| Min. Tank Size | 29 gallons (for both species) | — | |
✅ Compatibility Positives
❌ Incompatibility Reasons
Species Profiles
Guppy — Poecilia reticulata
Hardy and colourful livebearers. Males' long flowing tails make them targets for fin-nipping species. Very prolific breeders.
Pea Puffer — Carinotetraodon travancoricus
World's smallest pufferfish — intensely territorial and nippy despite tiny size. Will attack fins and eat shrimp and snails.
Frequently Asked Questions
Can Guppy live with Pea Puffer?
Generally not recommended. Guppy and Pea Puffer are generally not recommended to be housed together. The issues listed above — whether water parameter incompatibility, predation risk, or aggression — create conditions where one or both fish are likely to suffer harm or chronic stress.
What tank size do I need for Guppy and Pea Puffer together?
A minimum of 29 gallons is recommended for keeping Guppy and Pea Puffer together. A larger tank improves water stability and reduces territorial conflict.
What temperature suits both Guppy and Pea Puffer?
74–82°F
Is a Guppy aggressive toward a Pea Puffer?
Guppy is peaceful and Pea Puffer is semi. Pea puffers will aggressively nip guppy fins.