Rock Beauty (Holacanthus tricolor)
Native to the tropical western and south-eastern Atlantic, from the Bermudas to Georgia, mainland U.S.A., and into the Gulf of Mexico, the Caribbean Sea, and along the Brazilian coast south to Trindade Island. Found in seaweed-covered shallow reef platforms, outer reefs, and depths up to about 90 meters.
Key Care Information
- Expert care required
- Omnivorous diet
- Medium light requirement
- Optimal temperature: 23-27°C (73-81°F)
- Water parameters: Specific gravity 1.023–1.025, pH 8.1–8.4
Behavior and Habitat
Adults primarily feed on sponges encrusted on rocks (up to 99%). They typically live in pairs or small groups, with males defending territories. Spawning occurs during dusk, usually in the days leading up to the full moon.
| Parameter | Value |
|---|---|
| Origin | Caribbean and tropical Atlantic |
| Temperature | 23–27°C (73–81°F) |
| Water Specific Gravity | 1.023–1.025 |
| pH | 8.1–8.4 |
| Light | Medium |
| Diet | Omnivorous |
FAQ
What is the natural habitat of the Rock Beauty?
The Rock Beauty is native to the tropical western and south-eastern Atlantic, ranging from the Bermudas to Georgia, the Gulf of Mexico, the Caribbean Sea, and along the Brazilian coast to Trindade Island. It inhabits shallow reef platforms, outer reefs, and depths up to about 90 meters, often in seaweed-covered areas.
What kind of water conditions does the Rock Beauty require?
It requires a specific gravity of 1.023–1.025, pH between 8.1 and 8.4, and a temperature range of 23–27°C (73–81°F). Medium light is recommended.
How does the Rock Beauty behave in the wild?
Adults typically live in pairs or small groups, with males defending territories. They feed almost exclusively on sponges attached to rocks. Spawning occurs during dusk, usually in the days leading up to the full moon.
Sue Hart –
The Rock Beauty is a striking addition to my reef tank. It’s active and curious, and the male defends its territory well. I’ve maintained the correct water parameters and it’s thriving. Feeding is straightforward with sponge-based food. Needs expert care, but worth the effort.
Virginia King –
I’ve had this fish for three months now. It’s very peaceful and stays in its designated area. The water parameters are stable, and it’s eating regularly. A bit shy at first, but now it’s exploring more. Great for a reef setup with proper lighting and stable conditions.
Sarah Jones –
This fish is beautiful and active. I noticed it forming a small group with another rock beauty. The tank conditions are tight, but I’ve kept the temperature and pH within the recommended range. Feeding is simple—just a bit of sponge or algae-based food.