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Foxface Rabbitfish

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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.