Compatibility Overview
Angelfish 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 | Angelfish | Pea Puffer | Verdict |
|---|---|---|---|
| Temperature | 74–84°F | 74–82°F | ✅ 74–82°F |
| pH Range | 6.0–7.5 | 7.0–8.0 | ⚠️ 7.0–7.5 (narrow) |
| Temperament | semi | semi | ⚠️ Monitor |
| Adult Size | 6 in | 1 in | ❌ 6× difference |
| Min. Group | 1+ | 1+ | See below |
| Min. Tank Size | 55 gallons (for both species) | — | |
✅ Compatibility Positives
❌ Incompatibility Reasons
Species Profiles
Angelfish — Pterophyllum scalare
Elegant South American cichlids with long flowing fins. Generally peaceful but territorial when breeding and will eat very small fish.
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 Angelfish live with Pea Puffer?
Generally not recommended. Angelfish 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 Angelfish and Pea Puffer together?
A minimum of 55 gallons is recommended for keeping Angelfish and Pea Puffer together. A larger tank improves water stability and reduces territorial conflict.
What temperature suits both Angelfish and Pea Puffer?
74–82°F
Is a Angelfish aggressive toward a Pea Puffer?
Angelfish is semi and Pea Puffer is semi. Limited pH overlap (7.0–7.5) — maintain pH carefully within this narrow window.