Black Spot Foxface Rabbitfish (Siganus Unimaculatus)

The Black Spot Foxface Rabbitfish features a vivid yellow body accented by a distinct black-and-white mottled pattern on the head and a prominent dark spot near the rear. Renowned for its natural algae control, this hardy marine grazer actively consumes nuisance hair algae and bubble algae to keep your saltwater aquarium pristine.

Reaching up to 20–25 cm in length, it thrives in spacious community and reef setups of at least 265–340 L with ample swimming room and live rock for continuous grazing. While generally peaceful toward other tankmates, handle with care as this species possesses defensive venomous dorsal, pelvic, and anal spines.

Key Features

Highlights

• Scientific Name: Siganus unimaculatus
• Primary Common Name: Black Spot Foxface Rabbitfish
• Other Common Names: One Spot Foxface, Blotched Foxface, One Spot Rabbitfish
• Origin: Western Pacific, Eastern Asia
• Max Size: 8-10 inches (20-25 cm)
• Temperament: Peaceful (Venomous Spines)
• Diet: Herbivore (Algae Grazer)
• Minimum Tank Size: 70-90 Gallons
• Reef Compatibility: With Caution (May nip corals if underfed)

Materials & care

• Diet: This fish is a primary herbivore and a voracious algae eater. Its diet must be largely comprised of marine plant matter to ensure long-term health and prevent nipping behavior. It should be provided with an unlimited supply of marine algae, such as dried seaweed sheets (Nori) secured by a clip, and supplemented with high-quality vegetable-based pellets or flakes.
• Feeding: The Foxface should be allowed to graze on natural algae on the rockwork throughout the day and be offered supplemental feedings of Nori 3-4 times a week. A well-fed Foxface is less likely to nip at corals.
• Reef Compatibility: Reef Safe With Caution. While this species is beneficial for algae control, a hungry or underfed specimen may occasionally nip at the polyps of some large polyp stony (LPS) and soft corals (like Zoanthids or Xenia). This risk is greatly minimized by providing a continuous, diverse herbivorous diet.
• Temperament: Peaceful. The Black Spot Foxface is a timid fish that may hide or display a mottled, stressed camouflage pattern when first introduced. It is compatible with most other peaceful species. It should only be kept singly, or occasionally in a bonded pair, as it will be aggressive toward other Rabbitfish or Foxface species. Its venomous spines allow it to be housed safely even with some more aggressive fish.
• Handling Caution: The venomous spines deliver a painful sting. The venom is protein-based and can be denatured by heat. If stung, soak the wound in the hottest water tolerable for 30-90 minutes and seek medical help promptly.

Compatibility

Peaceful toward most non-rabbitfish tankmates, but should generally be kept singly or as a bonded pair as it can show aggression toward other Foxface and Rabbitfish species. Caution is advised in reef tanks with soft corals and LPS polyps if not sufficiently fed.

Important Fulfillment Information

Fish and corals ship Monday through Thursday. Not all fish are sexed. If so it will specify.

Once your order ships, you will receive an email with your tracking number. Refunds are always issued for any fish not shipped.

PlantedPlus operates as a collective of trusted freshwater and saltwater importers. This policy allows us to prioritize animal welfare while maintaining reliable service for our hobbyists.

Shipping Cost Disclosure

To help keep ordering live fish online affordable, Planted Plus subsidizes a portion of shipping costs. Because these costs are incurred regardless of order completion, shipping charges are non-refundable.