
Surgeonfish, Angelfish, and Butterflyfish
Rock Beauty
Holacanthus tricolor
Photo: Laszlo Ilyes (laszlo-photo) from Cleveland, Ohio, USA · CC BY 2.0 · Wikimedia Commons
Key facts
- Temperature24–27 °C
- pH8.1–8.4
- Minimum tank600 l
- Adult size35 cm
- Difficulty★★★★☆
- TemperamentSemi-aggressive
- WaterMarine
- Reef safeNo
Full profile
- Family
- Pomacanthidae
- Origin
- Tropical Western Atlantic
- Size
- 35 cm
- Temperature
- 24 – 27°C
- pH
- 8.1 – 8.4
- Salinity
- 1.023 – 1.025
- Difficulty
- ★★★★☆
- Water type
- marine
- Swimming level
- middle
- Behavior
- semi-aggressive
- Minimum number of individuals
- 1
- Minimum aquarium size
- 600 L
- Diet
- omnivore (sponges)
- Reproduction
- oviparous
- Reef Safe
- ❌ No
Notes: Yellow with a black rear half. Requires sponges in its diet; difficult to keep long-term.





