Magnificent Foxface - Siganus magnificus

SM (2.6-3")

$199.99

Magnificent Foxface - Siganus magnificus

Rabbitfish & Foxface Reef Safe Caution

$199.99

Size Small (2.1-2.5") SM (2.6-3") Medium (3.1-3.5") ML (3.6-4.25") Large (4.26-5") XL (5.1-6") XX (6.1-7")

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Goes well with:

Diet

algae/nori spirulina mysis brine shrimp

Min Tank Size 125 gallons

Temperament Peaceful

Reef Safe With Caution

Care & Diet Feeding, nutrition, and best practices.

Diet Type: Omnivore

Diet and Feeding: The Magnificent Foxface is primarily herbivorous, grazing on marine algae, seaweed, and filamentous growth in the wild, though it will also opportunistically take small meaty items. In captivity, it is beneficial to make the bulk of the diet high-quality nori, red and green seaweed, spirulina-based flakes, marine algae pellets, and herbivore formulas designed for tangs and rabbitfish. To ensure balanced nutrition, supplement regularly with frozen mysis shrimp, enriched brine shrimp, chopped seafood, and other marine-based treats in moderation. Offering seaweed on a clip or feeding station encourages natural foraging behavior and helps keep the fish engaged and comfortable. Feed small portions once or twice daily, adjusting to appetite, and avoid overfeeding to maintain excellent water quality and prevent unnecessary weight gain.

algae/nori spirulina mysis brine shrimp

Behavior Temperament, activity level, and interactions.

Temperament: Peaceful

The Magnificent Foxface is an active, open-water swimmer that also spends time weaving through rockwork, so it does best in a spacious aquarium with plenty of open swimming room plus secure hiding spots and overhangs. It is generally peaceful but can be semi-aggressive toward conspecifics, especially in smaller systems, and is usually kept singly unless housed in very large tanks. A minimum of 125 gallons is recommended, with a layout built around ample rockwork and visual barriers to reduce stress and help establish a comfortable territory. In most reef settings it is considered reef-safe with caution, as it is typically compatible with corals and many invertebrates, though individual behavior should still be monitored. It coexists well with similarly sized, non-aggressive tank mates, but overly timid species may be outcompeted at feeding time. Dietarily, it is primarily herbivorous with opportunistic omnivorous tendencies, grazing continuously on marine algae and accepting nori, spirulina-based foods, and other vegetable fare supplemented with meaty offerings. Regular grazing access and varied feeding help maintain health, coloration, and steady behavior.

Tank & Aquascape Tank requirements and aquascaping tips.

Min Tank Size: 125 gallons
Max Size: 10 inches
Care Level: Moderate
Origin: Indian Ocean

Compatibility Tank mates, aggression, and introduction order.

Temperament: Peaceful
Reef Safe: With Caution

Reef & Health Reef safety, common issues, and prevention.

Reef Safe: With Caution
Care Level: Moderate

FAQs Answers to the most common questions.

How can I reliably tell a Magnificent Foxface (Siganus magnificus) apart from a One-spot Foxface or Scribbled Rabbitfish when shopping?

The Magnificent Foxface is typically more vividly patterned and cleanly contrasted than most other foxfaces. Look for the bold yellow/orange face and body with a strong dark black-to-brown rear half and a sharp white or pale vertical band near the head/shoulder area. Juveniles often have a more obvious “fox-like” profile with a brighter yellow front and darker rear. It’s easy to confuse them with other Siganus species when stressed, so compare body shape, the exact placement of dark patches, and ask for the scientific name; stores often label all foxfaces loosely.

What tank size and aquascape does a Magnificent Foxface actually need long term?

A minimum of about 75 gallons is the practical floor for a single adult, but 90–120 gallons is much better because they are active swimmers and appreciate open water. They need sturdy rockwork for grazing and sleeping, but not a rock wall that blocks swim space. Leave broad lanes in the tank, because they cruise constantly and can become skittish if cramped. Use tightly secured rock and stable decorations, since they may startle and dart. A lid is strongly recommended, as foxfaces can jump when frightened.

Will a Magnificent Foxface really eat bubble algae and hair algae, or is that hobby myth?

It can help with some nuisance algae, but it is not a magic fix. Many individuals graze on filamentous algae, film algae, and some bubble algae, but results vary by specimen and tank conditions. They are primarily omnivorous herbivores, so they do best when algae is supplemented with seaweed, nori, spirulina-based foods, and quality frozen foods. If you rely on it alone for algae control, you’ll likely be disappointed. Think of it as a grazer that may assist with algae management, not a dedicated cleanup crew.

Are Magnificent Foxfaces reef safe, and what corals or invertebrates are most at risk?

They are generally considered reef safe with caution. Most individuals leave healthy corals alone, but they may nip at fleshy LPS, zoanthids, soft corals, or clam mantles if underfed or personality-driven. They are usually safe with most fish, snails, and larger shrimp, though any fish can become curious. The biggest reef concern is not “predation” so much as opportunistic grazing and sampling. Heavy, varied feeding greatly reduces the chance of coral nipping.

How dangerous are the dorsal and anal spines on a Magnificent Foxface, and what should I do if I get stung?

Very dangerous by aquarium standards. Like other rabbitfish, the Magnificent Foxface has venomous spines that can deliver a very painful sting, swelling, and throbbing that can last hours. Handle them only with containers, fish traps, or thick gloves, never by hand. If stung, immerse the area in hot water that is tolerable to the skin, and seek medical attention if there is severe pain, spreading swelling, allergic reaction, or any symptoms beyond a typical localized sting. Avoid panic and don’t cut or suck the wound.

You will receive a fish SIMILAR in design and size to the fish in the photo. This is NOT a WYSIWYG fish.

Magnificent Foxface – Siganus magnificus

The Magnificent Foxface is an exceptional saltwater fish recognized by its bold black facial mask, pearly white chest, dark charcoal saddle, and bright yellow-to-orange fins. Red-orange accents along the dorsal spines add further contrast, giving this rabbitfish a refined appearance that stands apart from more commonly available foxface species.

Native to the eastern Indian Ocean, Siganus magnificus occurs from Thailand and the Similan Islands south to Java, Indonesia. It inhabits coral reefs at depths of approximately 2–30 meters, where adults are usually seen alone or in pairs and juveniles remain close to protective coral structure. The species reaches about 24 cm in standard length, placing it near 10 inches at full size.

Its striking coloration, active grazing behavior, and generally peaceful temperament make the Magnificent Foxface desirable for large reef aquariums and fish-only aquariums. It is an adaptable feeder that consumes algae and small invertebrates, although its venomous fin spines and occasional interest in fleshy corals require appropriate care and handling.

Quick Care Guide

Care Level: Moderate
Minimum Tank Size: 125 gallons
Temperament: Peaceful
Diet: Herbivore / Omnivore
Reef Safe: With Caution
Region: Eastern Indian Ocean—Thailand and the Similan Islands to Java, Indonesia
Scientific Name: Siganus magnificus

Tank Requirements

Provide a mature aquarium with a long swimming footprint, abundant live rock, and broad open areas through the center and front of the display. Arrange the rockwork into caves, overhangs, and sheltered passages while leaving plenty of exposed surfaces for natural grazing.

Moderate to strong, well-distributed water movement, excellent oxygenation, and efficient filtration are recommended. This active rabbitfish produces substantial waste when fed properly, so dependable biological filtration and regular maintenance are important. A specialized substrate is not required; reef sand or fine gravel is suitable.

Provide a secure retreat large enough to accommodate the fish at its adult size. Rabbitfish may become pale, dark, or mottled when resting or frightened, and newly introduced specimens often remain close to shelter until comfortable.

Use a fitted lid or secure aquarium cover. Exercise extreme care during maintenance, capture, and transfer because the fin spines are venomous and can deliver a painful injury. A rigid specimen container is generally safer than a fine-mesh net, which can become caught on the spines.

Diet and Feeding

The Magnificent Foxface feeds naturally on algae and small invertebrates. In captivity, vegetable-based marine foods should form the foundation of its diet, supported by moderate amounts of appropriately sized animal protein.

Offer nori or other marine algae sheets daily, along with spirulina flakes, herbivore pellets, frozen algae blends, and foods formulated for rabbitfish or surgeonfish. Natural algae growing on mature live rock provides valuable additional grazing opportunities.

Supplement with mysis shrimp, enriched brine shrimp, finely chopped clam, krill, and quality frozen omnivore blends. Feed two to three small meals daily and provide regular access to algae sheets. Multiple feeding clips can reduce competition when the fish is housed with tangs or other large herbivores.

Adequate feeding supports body condition and may reduce unwanted interest in corals, but it cannot guarantee completely reef-safe behavior.

Temperament and Tankmates

The Magnificent Foxface is generally peaceful toward unrelated marine fish and is usually confident enough to coexist with moderately assertive community species. Suitable tankmates include tangs, angelfish, butterflyfish, larger wrasses, clownfish, rabbitfish of different shapes, and other non-predatory fish that will not prevent it from feeding.

Adults naturally occur alone or in pairs, but two unrelated aquarium specimens may not form a compatible pair. Keep one specimen in most home aquariums unless a proven pair is available and the system provides substantially more room.

Use caution with other rabbitfish and foxfaces, especially similarly shaped species. Territorial behavior can develop once an individual becomes established. Introduce timid fish before the foxface whenever possible and provide visual barriers to reduce prolonged chasing.

Its venomous spines provide an effective defense, but they do not make the fish suitable for housing with highly aggressive predators. Persistent harassment can still cause stress, hiding, and poor feeding.

Reef Compatibility

The Magnificent Foxface is reef safe with caution. Most individuals focus their grazing on algae growing across rockwork and aquarium surfaces and do not actively hunt ornamental shrimp, crabs, snails, or other mobile invertebrates.

However, an underfed or particularly curious specimen may nip fleshy large-polyp stony corals, soft corals, zoanthids, sponges, or other sessile animals. Decorative macroalgae may also be consumed. Individual behavior varies, and generous feeding does not completely eliminate the risk.

Monitor the fish carefully after introduction and after any major change in feeding routine. Aquarists maintaining valuable fleshy corals should have a practical removal plan available.

Water Parameters

Temperature: 75–80°F
Specific Gravity: 1.024–1.026
pH: 8.1–8.4
Alkalinity: 8–12 dKH

Maintain consistent salinity, excellent oxygenation, and low levels of accumulated organic waste. Long-term stability is more important than repeatedly adjusting the aquarium to achieve one exact reading.

Common Considerations

Venomous fin spines: Avoid direct handling and use extreme care during capture, transfer, or aquarium maintenance.
Requires substantial swimming room: Adults approach 10 inches and need a long, open aquarium rather than densely packed rockwork.
Reef safe with caution: Fleshy corals, soft corals, zoanthids, and decorative macroalgae may be nipped.
Provide algae-rich foods daily: Natural aquarium growth alone may not support a mature specimen.
Use caution with other rabbitfish: Conspecifics and similarly shaped foxfaces may trigger territorial behavior.