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Foxface (Siganus vulpinus)

Foxface

Siganus vulpinus
Family
Rabbitfish / Siganidae
Care level
Beginner
Temperament
Peaceful
Reef safe
Reef safe
Max size
24 cm
Min tank
400 L · 106 gal
Origin
Indo-Pacific
Diet
Herbivore
Food
Nori, Marine algae, Herbivore pellets, Spirulina, Vegetable frozen blends

Overview

The Foxface is a distinctive yellow-bodied fish with a dark brown-and-white striped face resembling a fox's mask, one of the most popular rabbitfish in the marine hobby. It's a peaceful, effective algae grazer and a popular alternative to tangs for keepers wanting herbivorous grazing without the territorial issues common among surgeonfish.

Like all rabbitfish it carries venomous spines in its dorsal, anal, and pelvic fins, used purely for defence rather than aggression, so care is needed when netting or handling this fish.

Given its adult size and grazing needs, it does best in a large, well-established tank with plenty of live rock supporting natural algae growth alongside regular supplemental feeding.

Compatibility

Foxfaces are peaceful and generally get along well with tangs, angelfish, and other community fish, rarely showing the territorial aggression common among surgeonfish. They are fully reef safe and won't bother corals, clams, or invertebrates.

Care should be taken when netting or handling this fish, as its venomous spines can deliver a painful sting if mishandled, though it poses no threat to tankmates under normal circumstances.

Health & quarantine

This species is generally hardy once acclimated, though care is needed during any netting or transfer due to its venomous spines, which can also become entangled in nets. A minimum four-week quarantine is recommended, and a calm, well-fed tank supports its transition onto a varied prepared diet.

Frequently asked questions

Are Foxface spines dangerous?
They're venomous and can deliver a painful sting if the fish is mishandled or netted carelessly, but they pose no threat to tankmates under normal conditions.
Is the Foxface reef safe?
Yes, fully reef safe with corals and invertebrates.
Is the Foxface a good alternative to a tang?
Yes, it offers similar algae-grazing benefits with a generally more peaceful temperament than most tangs.
What tank size does a Foxface need?
At least 400 litres given its adult size and grazing requirements.
Can I keep a Foxface with tangs?
Yes, it generally coexists peacefully with tangs and rarely competes aggressively for territory.

Care guidance is drawn from our own experience — every fish is an individual, so treat it as a starting point, not a guarantee. Not sure if a species suits your tank? Come ask us in store. New to the terms? Read the care-terms glossary.