One-Spot Foxface

Siganus unimaculatus is a peaceful community fish that coexists well with a wide range of reef-safe species. Its calm temperament makes it suitable for mixed-species aquaria, provided tank mates are not excessively aggressive or territorial.

Compatible companions include tangs, angelfish, wrasses, clownfish, gobies, and other herbivorous or planktivorous reef fish. The One-Spot Foxface typically avoids conflict and relies on its venomous spines only when threatened or cornered.

Highly aggressive species that may harass or repeatedly challenge the Foxface should be avoided, as chronic stress can lead to immune suppression. Adequate swimming space, multiple grazing zones, and proper stocking density help ensure long-term harmony.

This species is generally reef-safe but may nip at soft corals or polyps if underfed. Maintaining a consistent algae-rich diet minimizes this risk and preserves compatibility within reef systems.

The One-Spot Foxface is a hardy and adaptable rabbitfish species that performs best in medium to large marine aquaria with stable reef conditions. A minimum tank volume of 350 liters is required to provide sufficient swimming space and environmental stability. This species benefits from a well-balanced aquascape that includes both open swimming areas and substantial live rock structures that support natural algal growth.

Live rock plays a critical role in the long-term success of Siganus unimaculatus, as it provides continuous grazing opportunities and environmental enrichment. The aquarium should be mature, with stable biological filtration and consistent water parameters. Moderate to strong water flow is ideal, ensuring proper oxygenation while simulating natural reef currents.

Lighting requirements are flexible, but reef-capable lighting that supports algal and coral growth is beneficial. Water quality should be maintained with efficient protein skimming and regular water changes, though this species is more tolerant of minor fluctuations than many tangs.

The One-Spot Foxface possesses venomous dorsal spines used strictly for defense. Aquarists must exercise caution during tank maintenance. When provided with adequate space, stable conditions, and a mature environment, this species is resilient, long-lived, and highly beneficial in controlling nuisance algae.

The One-Spot Foxface is a primarily herbivorous grazer that feeds on filamentous algae and macroalgae in the wild. In captivity, a plant-based diet is essential for digestive health, coloration, and immune support.

Dried marine algae such as nori should be offered daily and forms the cornerstone of the diet. High-quality herbivore pellets and flakes fortified with vitamins provide nutritional balance. Fresh macroalgae such as gracilaria or ulva enhance dietary variety and enrichment.

Although this species may consume small amounts of meaty foods opportunistically, animal protein should remain a minor component of the diet. Excess protein intake increases the likelihood of coral nipping and digestive stress.

Frequent feeding supports natural grazing behavior and reduces aggression or boredom. A consistent, algae-focused feeding routine is critical to maintaining long-term health and reef compatibility.

Captive breeding of Siganus unimaculatus is rare and largely restricted to commercial aquaculture facilities. In the wild, this species reproduces via pelagic spawning, releasing eggs into open water where fertilization occurs externally.

Successful reproduction requires large groups, environmental cues, and expansive water volumes that are not achievable in home aquaria. Sexual dimorphism is subtle, making intentional breeding difficult.

Larvae are planktonic and demand extended periods of specialized care, including live microfoods and extremely stable water conditions. Mortality rates are high outside professional systems.

As a result, most One-Spot Foxface specimens in the aquarium trade are wild-caught or commercially aquacultured. Ongoing research continues to improve captive breeding techniques and sustainability.