Melon Butterflyfish (Tonga) – XL Size: 4″ to 5″
Scientific Name: Chaetodon ornatissimus
Reef Compatible: Yes
Care Level: Intermediate
Disposition: Peaceful
Minimum Tank Size: 50 gallons
Mature Size: 7 inches
| Feature | Detail |
|---|---|
| Species | Chaetodon ornatissimus |
| Size (Adult) | Up to 7 inches |
| Size (Available) | 4″ to 5″ |
| Compatibility | Reef-safe, peaceful |
| Difficulty Level | Intermediate |
| Minimum Tank Size | 50 gallons |
FAQ
Is the Melon Butterflyfish suitable for a reef tank?
Yes, the Melon Butterflyfish is reef compatible and generally peaceful, making it a good choice for reef aquariums.
What is the expected mature size of this fish?
The mature size of the Melon Butterflyfish is up to 7 inches.
What is the minimum tank size required for this fish?
A minimum tank size of 50 gallons is recommended.



Phil Arnold –
The Melon Butterflyfish is active and colorful. It has adapted well in a 55-gallon tank with corals. Easy to observe and doesn’t stress other fish. Great for intermediate reef keepers.
Ava Poole –
It’s a beautiful addition to the tank. Stays calm and doesn’t eat coral. Needs a stable environment and regular water testing. Slightly shy at first but becomes confident over time.
Dominic Lyman –
Perfect for a reef setup. The fish is vibrant and stays in the middle of the tank. I’ve had it for three months and it’s thriving. No issues with aggression or feeding.