One Spot Foxface - Siganus unimaculatus
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The One Spot Foxface (Siganus unimaculatus) is a striking reef herbivore, easily recognized by its bright yellow body, contrasting black and white facial mask, and a single dark spot on the side. Known for its peaceful nature and efficient algae grazing, this foxface adds vibrant color and natural algae control to marine aquariums, while its venomous dorsal spines make careful handling essential.
Common Name: One Spot Foxface
Scientific Name: Siganus unimaculatus
Family: Siganidae
Size: Up to 10 inches (25 cm)
Temperament: Semi-aggressive
Difficulty: Moderate
Reef Safe: With caution
Native Region: Found throughout the Western Pacific, including Indonesia, the Philippines, and Papua New Guinea, typically inhabiting coral reef slopes and lagoons.
Tank Size: Minimum of 75 gallons
Temperature: 74–82°F (23–28°C)
pH: 8.0–8.4
Salinity: 1.023–1.025
Substrate: Open swimming space with live rock for grazing; provide hiding spots and stable rockwork.
• Algae Control: Actively grazes on nuisance algae, helping maintain a cleaner tank environment.
• Handling: Dorsal spines are venomous; exercise caution when acclimating or moving.
• Diet: Herbivorous—feed a mix of macroalgae, seaweed sheets, and prepared herbivore foods.
• Tankmates: Compatible with most semi-aggressive and peaceful species; avoid very small or slow-moving fish.