The Foxface Rabbitfish (Siganus vulpinus), also known as the Foxface Lo, is a popular marine species among aquarists due to its vibrant colours and algae-eating habits. Native to the Indo-Pacific region, this species is appreciated for its hardiness and unique appearance.
Key Information
• Small fish safe: ✔️ Yes (generally peaceful)
• Small invertebrate safe: ✔️ Yes (primarily herbivorous)
• Coral safe: ⚠️ With caution (may nip at corals if underfed)
• Minimum tank size: Approximately 400 litres (105 gallons)
• Adult size: Up to 24 cm (9.5 inches)
• Diet: Herbivorous, feeding mainly on algae
• Be aware of: Venomous dorsal spines; handle with care
Appearance and Colouration
The Foxface Rabbitfish is easily recognisable by its distinctive colour pattern:
• Body: Bright yellow with a contrasting black and white face
• Fins: Dorsal, anal, and pelvic fins contain venomous spines used for defence
Natural Habitat and Behaviour
In the wild, Siganus vulpinus inhabits coral-rich areas of lagoons and seaward reefs, often found at depths ranging from 1 to 30 metres. They are typically seen in pairs or small groups, grazing on algae-covered substrates.
Aquarium Care
• Tank Size: A minimum of 400 litres (105 gallons) is recommended to accommodate their active swimming and growth.
• Water Parameters:
• Temperature: 24°C – 28°C (75°F – 82°F)
• pH: 8.1 – 8.4
• Specific Gravity: 1.020 – 1.025
• Diet: Primarily herbivorous; provide a variety of algae-based foods such as nori sheets, spirulina, and blanched vegetables like lettuce or spinach. Supplement with high-quality herbivore pellets.
• Reef Compatibility: Generally considered reef-safe; however, if underfed, they may nip at soft and large-polyp stony (LPS) corals. Ensuring a proper diet can mitigate this behaviour.
Behaviour and Compatibility
Foxface Rabbitfish are peaceful and can coexist with a variety of tank mates, including:
• Suitable Companions: Tangs, angelfish, clownfish, and wrasses
• Caution: Avoid housing with other rabbitfish species unless in very large aquariums, as they may exhibit territorial behaviour.
Special Considerations
• Venomous Spines: Exercise caution when handling or performing tank maintenance, as their dorsal spines are venomous and can cause painful stings.
• Dietary Needs: A well-fed Foxface is less likely to exhibit undesirable behaviours, such as nipping at corals. Ensure they have constant access to algae or plant-based foods.
Summary
The Foxface Rabbitfish (Siganus vulpinus) is a vibrant and beneficial addition to marine aquariums, known for its algae-grazing habits and peaceful nature. Proper care, attention to diet, and awareness of their venomous spines are essential to maintaining a healthy and harmonious tank environment.