
Gobies, blennies, and small marine fish
Horned Cowfish
Lactoria cornuta
Photo: Diego Delso · CC BY-SA 4.0 · Wikimedia Commons
Key facts
- Temperature24–27 °C
- pH8.1–8.4
- Minimum tank600 l
- Adult size45 cm
- Difficulty★★★★☆
- TemperamentPeaceful
- WaterMarine
- Reef safeWith caution
Full profile
- Family
- Ostraciidae
- Origin
- Indo-Pacific and Red Sea
- Size
- 45 cm
- Temperature
- 24 – 27°C
- pH
- 8.1 – 8.4
- Salinity
- 1.023 – 1.025
- Difficulty
- ★★★★☆
- Water type
- marine
- Swimming level
- medium
- Behavior
- Peaceful (may release toxins when stressed)
- Minimum number of individuals
- 1
- Minimum aquarium size
- 600 L
- Diet
- omnivore
- Reproduction
- oviparous
Notes: Yellow, box-shaped body with two “horns” above the eyes. Like the boxfish, it releases dangerous toxins if it becomes stressed or dies. Keep only with peaceful tankmates. Reef Safe: ⚠️ Use with caution





