Is the Foxface Rabbitfish venomous?

Yes, its dorsal, anal, and pelvic spines are venomous. While not usually fatal to humans, a sting is intensely painful and causes localized swelling, similar to a severe wasp sting. Extreme care should be taken during tank maintenance and when moving the fish.

Will a Foxface eat my corals?

They are considered 'reef safe with caution'. If kept well-fed with plenty of algae and greens, they typically ignore corals. However, some individuals may develop a taste for zoanthids or fleshy LPS corals if they become hungry.

Why has my Foxface turned brown and blotchy?

This is known as their 'fright' or camouflage pattern. They naturally adopt this mottled, dark appearance when they are stressed, frightened, or resting at night to seamlessly blend in with the reef rockwork.

Can I keep more than one Foxface together?

In most home aquariums, it is not recommended. Unless you can acquire a confirmed mated pair and have a very large tank, they are typically highly aggressive toward other rabbitfish.

What should I feed my Foxface Rabbitfish?

Their diet should consist heavily of marine algae, such as dried nori sheets and spirulina-based foods. You should also supplement this with high-quality meaty foods like mysis or brine shrimp to ensure completely balanced nutrition.

MarineMarineIntermediate

Foxface Rabbitfish

Siganus vulpinus

The Foxface Rabbitfish is a striking and hardy marine species, renowned for its bright yellow body, unique badger-like facial markings, and robust appetite for nuisance algae.

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Ideal Conditions

Temperature: 24 – 28 °C
pH range: 8.1 – 8.4
Hardness: 8 – 12 dGH
Salinity: 1.02 – 1.025 SG
Adult size: 18 – 24 cm
Min. volume: 400 litres+
Lifespan: 5 – 10 years
Diet: Omnivore with a strong herbivorous preference
Water flow: Moderate to strong
Preferred setup: Ample live rock for grazing and hiding, alongside wide open swimming space.

About the Foxface Rabbitfish

Siganus vulpinus, commonly known as the Foxface, is a staple in many large marine aquariums. It is easily identifiable by its vibrant yellow colouration contrasted against a stark black-and-white face. Though generally a peaceful addition to a community tank, this species possesses venomous dorsal, anal, and pelvic spines used strictly for defence. They are exceptional algae grazers, making them highly beneficial for maintaining a clean reef or fish-only aquarium environment.

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Is it right for your tank?

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Where Foxface Rabbitfish comes from

Native range

Western Pacific Ocean

Countries / regions

Indonesia, Philippines, Australia, Papua New Guinea, New Caledonia

Habitat

Coral-rich areas of lagoons and seaward reefs

Commonly found among branching corals where they feed heavily on benthic algae.

Similar species

One Spot Foxface
Siganus unimaculatus
Magnificent Foxface
Siganus magnificus
Bicolor Foxface
Siganus uspi

We’re adding more full species guides as the catalogue grows.

Compatible tank mates

Reviewed guidance based on this species' recorded traits.

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Ocellaris Clownfish
Amphiprion ocellaris
Peaceful community fish that inhabit different zones and do not compete for food.
Great
Coral Beauty Angelfish
Centropyge bispinosa
Generally peaceful dwarf angelfish that coexist well with the robust Foxface without stepping on each other's toes.
Great
Yellow Tang
Zebrasoma flavescens
Both are large herbivores of similar colour and shape; they may compete for grazing areas and show territoriality if the tank is too small.
Compatible with caution
Large Polyp Stony Corals
Scleractinia
While generally reef safe, a hungry Foxface may nip at large polyp stony corals or zoanthids.
Compatible with caution
Magnificent Foxface
Siganus magnificus
Highly intolerant of other rabbitfish species in the same aquarium.
Not recommended

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