Saltwater Fish
Siganus unimaculatus
Siganus unimaculatus
(One Spot Foxface Rabbitfish)

Species Description…

Scientific Name: Siganus unimaculatus
Common Name: One Spot Foxface Rabbitfish
Species Group: Rabbitfish
Habitat: Reef Safe with Caution
Care Level: Intermediate
Temperament: Peaceful
Diet Type: Herbivore
Role in Aquarium: Cleanup Crew
Max Fish Length: 8 (inches)
Min Aquarium Size: 125 (gallons)
Native Range: Indo-Pacific
Siganus Unimaculatus - The One Spot Foxface Rabbitfish

Siganus Unimaculatus (The One Spot Foxface Rabbitfish)

Overview

  • Native to the Western Pacific, particularly around coral reefs and rocky coastal areas.
  • Recognized for its bright yellow body and a distinctive black-and-white facial pattern, with a single dark blotch on its side.
  • A peaceful yet hardy species that is an excellent addition to reef aquariums.
  • Possesses venomous dorsal spines, which serve as a defense mechanism against predators.
  • Best suited for aquariums with ample swimming space, live rock formations, and stable water conditions.

Feeding

  • Herbivorous, primarily grazing on algae, seagrass, and marine plant material in the wild.
  • Requires a diet rich in seaweed, spirulina, algae-based pellets, and fresh marine greens.
  • Actively grazes on nuisance algae, contributing to the health and cleanliness of the aquarium.
  • Should be fed multiple times per day to maintain optimal energy levels and digestive health.
  • A balanced diet helps enhance coloration and supports a strong immune system.

Habitat

  • Prefers reef-associated environments with moderate water currents and plenty of grazing areas.
  • Often seen foraging along reef structures and rocky outcroppings.
  • Aquarium setups should include live rock to provide natural grazing opportunities and hiding spots.
  • Requires high-quality filtration and stable water conditions for long-term health.
  • Providing a spacious tank allows for natural movement and exploration.

Fish Care

  • Optimal water temperature: 74-80°F (23-27°C) to maintain metabolic stability.
  • Preferred pH range: 8.1-8.4, with a salinity level of 1.020-1.025.
  • Requires regular water changes and algae control to prevent excess buildup.
  • Generally reef-safe but may nip at soft corals if underfed or lacking plant-based foods.
  • Providing a well-balanced diet and structured habitat minimizes stress and ensures longevity.

Compatibility

  • Generally peaceful and coexists well with a variety of reef-safe species.
  • Compatible with tangs, angelfish, wrasses, and other herbivorous fish.
  • Should not be housed with overly aggressive species that may stress it.
  • Thrives in an aquarium with structured grazing areas and compatible tankmates.
  • Providing adequate space and hiding spots helps maintain harmony in the tank.

Aquarium Behavior

  • An active and social species that constantly grazes on algae and interacts with its surroundings.
  • Frequently observed swimming in open water while foraging along rock surfaces.
  • More confident in a well-established aquarium with plenty of natural grazing materials.
  • Providing structured rockwork and shaded areas supports its natural instincts.
  • Over time, it may become familiar with its caretaker and show excitement during feeding times.