Blackback Butterflyfish (Chaetodon melannotus)
Reef Compatible: Yes
Care Level: Intermediate
Disposition: Semi-aggressive
Minimum Tank Size: 50 gallons
Mature Size: 7 inches
Product Specifications
| Feature | Detail |
|---|---|
| Species | Chaetodon melannotus |
| Size (Adult) | 7 inches |
| Size (Adult Range) | 4″ to 5″ (initial) |
| Compatibility | Reef-safe |
| Behavior | Semi-aggressive |
| Minimum Tank Size | 50 gallons |
FAQ
Is the Blackback Butterflyfish suitable for a reef tank?
Yes, the Blackback Butterflyfish is reef compatible and can coexist with coral in a properly maintained reef tank.
What is the expected mature size of this fish?
The mature size of the Blackback Butterflyfish is approximately 7 inches.
What is the recommended tank size for keeping this fish?
A minimum tank size of 50 gallons is required for proper growth and well-being.

Lillian Ball –
The Blackback Butterflyfish arrived healthy and active. It has adapted well to our 55-gallon reef tank. We’ve noticed it’s curious and spends time near the coral, but it doesn’t cause any aggression. A good fit for intermediate reef keepers.
Christopher Ellison –
We’ve had this fish for three months now. It’s vibrant and active, though it does occasionally chase smaller fish. The tank size is adequate, and it’s not damaging the coral. Slightly more active than expected.
Tim McDonald –
Great addition to our reef setup. The fish is colorful and stays calm most of the time. We monitor its behavior closely, and it hasn’t shown any signs of aggression toward other tank mates.