20/05/2026
✨ Siganus vulpinus – Foxface Rabbitfish ✨
📝 Description
Siganus vulpinus, commonly known as the Foxface Rabbitfish or One-spot Foxface, is a striking marine fish recognized for its bright yellow body, contrasting black facial mask, and streamlined shape. It is one of the most popular herbivorous fish in reef aquariums due to its beauty, usefulness in controlling algae, and generally peaceful temperament. However, it is equipped with venomous dorsal spines, making careful handling essential.
🏞 Natural Habitat
Native to the Indo-Pacific region, including Indonesia, the Philippines, and parts of the Great Barrier Reef, Siganus vulpinus is typically found in coral-rich lagoons and outer reef slopes. It often swims in pairs or small groups, grazing on algae in shallow reef environments.
📏 Tank Size
Due to its active swimming behavior and adult size, a spacious aquarium is required:
🪸 Minimum tank size: 300–500 liters (80–130 gallons)
📐 Aquascape: open swimming space with live rock for grazing
🌊 Stability: mature reef or fish-only system with good oxygenation
While not as large as some tangs, it still needs room to thrive and establish natural behavior.
💧 Water Parameters
Thrives in stable marine conditions:
🌡 Temperature: 24–27°C (75–81°F)
⚖ Salinity: 1.023–1.026
📉 Nitrates: < 20 ppm
🔷 pH: 8.1–8.4
🍃 Feeding
Primarily herbivorous:
🌿 Marine algae (nori, macroalgae sheets)
🥬 Spirulina-rich flakes and pellets
🦐 Occasional meaty foods (mysis, brine shrimp)
A constant supply of algae-based food is essential to prevent stress and maintain immune health.
🪸 Reef Compatibility
✅ Reef safe with caution
Siganus vulpinus is generally considered reef-safe and even beneficial due to its algae-eating habits. However, it may occasionally nip at soft corals or LPS if underfed. It is very useful in controlling nuisance algae in reef aquariums.
🌊 Water Flow & Behavior
Prefers moderate water flow and high oxygen levels. It is typically peaceful and shy, especially when young, but becomes more confident with age. It should be kept either singly or as a bonded pair in most home aquariums, as multiple individuals may become territorial in confined spaces.
⚠ Handling Warning
This species possesses venomous dorsal spines capable of delivering a painful sting. Care must be taken during maintenance or netting.