Yellow Foxface Rabbitfish (Siganus Vulpinus)

The Yellow Foxface Rabbitfish is a vibrant and highly beneficial addition to marine aquariums, instantly recognizable by its vivid yellow body and striking black-and-white facial markings. Native to the coral-rich reefs of the Western Pacific, this active swimmer provides exceptional natural control over nuisance algae while maintaining a peaceful demeanor toward a wide variety of tankmates.

Equipped with defensive venomous spines, this species commands respect from larger fish and requires careful handling during aquarium maintenance. While primarily herbivorous and considered reef safe with caution, it thrives best in spacious setups with an abundance of plant matter, dried marine algae, and suitable grazing territory.

Key Features

Highlights

• Scientific Name: Siganus vulpinus
• Primary Common Name: Yellow Foxface Rabbitfish
• Other Common Names: Foxface Lo, Foxface, Common Foxface
• Origin: Western Pacific (Indo-Pacific, Great Barrier Reef)
• Max Size: 8-9 inches (20-23 cm)
• Temperament: Peaceful (Venomous Spines)
• Diet: Herbivore (Primarily algae/Nori)
• Minimum Tank Size: 100-125 Gallons
• Reef Compatibility: With Caution (May nip corals if underfed)

Materials & care

• Diet: The Foxface is primarily a herbivore and a dedicated algae grazer. Its diet must be rich in plant matter to remain healthy and prevent head and lateral line erosion (HLLE). Provide quality marine algae, such as Nori sheets, spirulina flakes, and herbivore pellets. Although it will accept meaty foods like mysis or brine shrimp, these should only be offered as an occasional supplement.
• Algae Control: This species is highly valued for its ability to consume certain types of nuisance algae, including hair algae and some Bryopsis strains.
• Reef Compatibility: It is considered reef safe with caution. While the Foxface generally ignores small fish and invertebrates, if underfed, it may nip at the fleshy polyps of certain LPS (Large Polyp Stony) or soft corals like Xenia or Montipora. Keeping it well-fed on greens is the best way to mitigate this risk.
• Temperament: Peaceful with most tankmates, even semi-aggressive fish like Triggerfish or Groupers, as its venomous spines deter potential predators. It is generally intolerant of other Rabbitfish (conspecifics) and should be kept singly or as a bonded pair.
• Stress Behavior: When stressed or sleeping, the Foxface will rapidly change its coloration to a dark, mottled pattern of browns and blacks for camouflage. This is a natural response and not a sign of illness.
• Venomous Spines: The fish possesses venomous spines. If stung, immediately immerse the affected area in the hottest water tolerable (not scalding) for 30-90 minutes, as heat breaks down the protein-based venom. Seek medical attention immediately.

Compatibility

Peaceful with most marine fish including semi-aggressive species, but typically intolerant of other rabbitfish unless kept as a bonded pair.

Important Fulfillment Information

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