Bicolor(Fiji) Foxface — Siganus uspi

Introduction to Saltwater Foxface & Rabbitfish

Foxface and Rabbitfish are hardy, vibrantly colored herbivores known for their unique body shapes, peaceful nature, and venomous dorsal spines. Found in Indo-Pacific coral reefs and lagoons, these fish are excellent algae grazers that help maintain a clean aquarium. While generally peaceful, they may become territorial toward similar herbivores in smaller tanks. Additionally, some individuals may nip at soft corals or fleshy LPS corals if underfed.

Care Requirements

Care Level: Easy to Moderate Minimum Tank Size: 70 – 125+ gallons Smaller species (e.g., One-Spot Foxface) – 70+ gallons Larger species (e.g., Magnificent Foxface) – 125+ gallons Aquarium Setup: Requires open swimming space and rockwork for grazing and shelter Foxface and Rabbitfish are active swimmers that require plenty of space to move freely. Providing hiding areas helps them feel secure, as they may become skittish when first introduced.

Diet & Nutrition

Foxface and Rabbitfish are primarily herbivorous and require a plant-based diet to stay healthy. Diet: Herbivorous – Prefers marine algae, seaweed, and plant-based foods

Recommended Foods:

Nori and seaweed sheets (offered daily) Spirulina-based flakes and pellets Fresh vegetables like blanched spinach and zucchini Occasional mysis shrimp or other meaty foods for variety A steady supply of algae is important for preventing coral nipping in reef tanks.

Lifespan & Growth Rate

Lifespan: 5-10+ years Growth Rate: Moderate to Fast – Some species reach 9+ inches With proper care, Foxface and Rabbitfish can live over a decade, making them a long-term commitment.

Temperament & Compatibility

Temperament: Peaceful to Semi-Aggressive – Can be territorial toward similar species Reef Safe? With Caution – May nip at soft corals if underfed Avoid housing them with highly aggressive fish, as their peaceful nature makes them easy targets for bullying.

Common Challenges & Considerations

Venomous Spines: The dorsal spines are venomous and can cause painful stings—handle with care. Shy When Introduced: May hide or change colors when stressed but become more active over time. Potential Coral Nipping: Ensure proper feeding to prevent coral grazing. Water Conditions Temperature: 74-80°F dKH (Alkalinity): 8-12 pH: 8.1-8.4 Specific Gravity: 1.020-1.025 Stable reef conditions and good water quality are key to maintaining health and coloration.

Color Varieties & Popular Species

Foxface and Rabbitfish come in various colors and patterns, making them standout additions to saltwater tanks. Foxface Rabbitfish (Siganus vulpinus) – Yellow body with black-and-white mask, one of the most common species Magnificent Foxface (Siganus magnificus) – Similar to the Foxface but with striking white, black, and yellow coloration One-Spot Foxface (Siganus unimaculatus) – Features a single black spot on its yellow body, slightly smaller than other species Blue-Spotted Rabbitfish (Siganus corallinus) – Covered in iridescent blue spots, known for its calm demeanor