Threeband Pennant Butterflyfish – Size M (2″ to 3″)
Species: Heniochus chrysostomus
Reef Compatible – With Caution
Care Level – Moderate
Min. Tank Size – 125 gallons
Mature Size – 7 inches
| Size | Range |
|---|---|
| Adult Size | 7 inches |
| Available Size | 2″ to 3″ |
| Compatibility | Reef compatible with caution |
| Difficulty Level | Moderate |
FAQ
Is this butterflyfish safe to keep in a reef tank?
This butterflyfish is reef compatible with caution. It may pose a threat to smaller polyps or soft corals, so careful monitoring is required.
What is the minimum tank size recommended for this fish?
A minimum tank size of 125 gallons is recommended to provide adequate space and stability for this species.
How long does it take for this fish to reach maturity?
This butterflyfish typically reaches a mature size of 7 inches over several years under proper care conditions.



Anne Peake –
The fish arrived healthy and active. It’s a beautiful addition to my 150-gallon reef tank. I’ve kept it for three months and it’s adapted well. I monitor it closely due to reef compatibility warnings, but it hasn’t damaged any corals yet.
Peter Peters –
Good coloration and movement. I’m cautious with my coral placement. It’s not aggressive, but I keep an eye on it to avoid any accidental interactions.
Peter Watson –
Perfect for a moderate reef setup. The size is appropriate for my tank. It’s active and shows interest in the water flow. I appreciate the clear species information provided.