Melon Butterflyfish (Chaetodon ornatissimus)
Reef compatible, suitable for intermediate aquarium keepers. This peaceful fish is ideal for a well-maintained marine environment.
Key Features:
- Reef compatible – does not harm coral or invertebrates
- Care level – intermediate
- Disposition – peaceful
- Minimum tank size – 50 gallons
- Mature size – up to 7 inches
- Size available – 2 inches or below (tiny)
| Parameter | Value |
|---|---|
| Scientific Name | Chaetodon ornatissimus |
| Size (Adult) | Up to 7 inches |
| Minimum Tank Size | 50 gallons |
| Compatibility | Reef-safe |
| Behavior | Peaceful |
FAQ
Is the Melon Butterflyfish safe to keep with corals?
Yes, the Melon Butterflyfish is reef compatible and does not pose a threat to corals or invertebrates.
What is the expected growth size of this fish?
The fish grows to a mature size of up to 7 inches, though the available size is 2 inches or below.
Is this fish suitable for beginners?
No, this species requires intermediate care and a minimum tank size of 50 gallons, making it more suitable for experienced aquarists.



Liam Mitchell –
The tiny Melon Butterflyfish has been thriving in my 50-gallon reef tank for three months. It’s active and peaceful, and doesn’t bother the corals. Easy to spot with its bright yellow and blue coloration. Great addition to a balanced reef setup.
Virginia Allan –
I was cautious about adding a butterflyfish due to compatibility concerns, but this one is reef-safe. It’s small and doesn’t dominate the tank. Feeds well on small crustaceans and looks vibrant.
Matt Chapman –
Perfect for intermediate reef keepers. The fish is calm and doesn’t stress other inhabitants. It’s been a joy to watch it swim through the coral formations. Highly recommend for those looking for a colorful, non-aggressive species.