Common name: Blotched foxface

Scientific name: Siganus unimaculatus (Evermann & Seale, 1907)
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One spot foxface (Siganus unimaculatus) in reef tankOne Spot Foxface, Siganus unimaculatus, a yellow saltwater marine fish with yellow body and black and white striped face. A good fish for eating algae

General information

The One-spot Foxface, Siganus unimaculatus, is a distinctive and popular marine fish known for its unique appearance and algae-grazing habits. It has a bright yellow body with a characteristic black spot on the side, which can fade or darken depending on the fish's mood or environment. This species is part of the Rabbitfish family and is appreciated for its peaceful nature and utility in controlling algae in the aquarium.

Details

Recommended minimum tank volume
200 liter (53 gallons)
Salinity
S.G. 1.020 to 1.025
Temperature
22 to 26 °C (72 to 79 °F)
Acidity
pH 8 to 8.4
Average size
35 cm (1′2″)
Care level
Moderate to easy Prone to swim bladder issues
Diet
Herbivore Algae-based diet; may nip at corals
Social
Solo Can be territorial; best kept alone
Reefsafe
No May graze on coralline algae
Aggression
Semi aggresive Territorial, especially with conspecifics
Captive bred
No

Taxonomy

  1. Kingdom
    Animals
    Animalia
  2. Phylum
    Chordates
    Chordata
  3. Class
    Ray-finned Fishes
    Actinopterygii
  4. Order
    Perch-like Fishes
    Perciformes
  5. Family
    Rabbitfish
    Siganidae
  6. Genus
    Rabbitfish
    Siganus
  7. Species
    Blotched foxface
    Siganus unimaculatus (Evermann & Seale, 1907)
  8. Synonyms
    Lo unimaculatus Evermann & Seale, 1907

Care

One-spot Foxfaces are hardy and adaptable, making them suitable for both novice and experienced aquarists. They require a tank with plenty of swimming space and live rock for grazing. It's important to handle them with care, as they have venomous dorsal spines that can inflict painful stings. A varied diet that includes algae and marine-based foods will help maintain their health and vibrant coloration.

Reproduction

In the wild, Siganus unimaculatus forms pairs during the breeding season. They are broadcast spawners, releasing eggs and sperm into the water column where fertilization occurs. In the aquarium, breeding is rare, but providing a stress-free environment with optimal water conditions may encourage spawning behavior.

Symbiosis

While not known for specific symbiotic relationships like clownfish with anemones, the One-spot Foxface does play a role in the reef ecosystem by grazing on algae, which helps prevent overgrowth and maintain a balance in the coral reef environment.

Habitat

The natural habitat of the One-spot Foxface includes coral reefs and lagoons in the Indo-Pacific region. They are often found in shallow waters where they have access to their primary food source, algae. Their range extends from the eastern Indian Ocean to the western Pacific Ocean, including the Great Barrier Reef and the islands of Micronesia.