Common name: Epaulette Surgeonfish

Scientific name: Acanthurus nigricauda Duncker & Mohr, 1929
Epaulette Surgeonfish (Acanthurus nigricauda)Epaulette Surgeonfish (Acanthurus nigricauda) underwater in the coral reef

General Information

The Epaulette Surgeonfish, scientifically known as Acanthurus nigricauda, is a striking species found in the aquarium trade, admired for its unique coloration and active demeanor. Known for the dark band or "epaulette" marking behind its eyes, this fish adds a dynamic presence to any marine aquarium. Its adaptability and resilience make it a popular choice for both novice and experienced aquarists.

In the wild, the Epaulette Surgeonfish plays a crucial role in maintaining the health of coral reefs by grazing on algae, which helps prevent algal overgrowth that can smother corals. This ecological role underscores its importance in both natural and artificial reef settings.

Details

Estimated price
Moderate
Recommended minimum tank volume
400 liter (110 gallons)
Salinity
S.G. 1.023 to 1.026
Temperature
24 to 28 °C (75 to 82 °F)
Acidity
pH 8 to 8.5
Average size
30 cm (1′)
Care level
Moderate to easy Moderate care; requires stable conditions and space
Diet
Herbivore Primarily feeds on algae; supplement with spirulina and pellets
Social
Solo Best kept solo or with other peaceful species
Reefsafe
Yes
Aggression
Semi aggresive Can be territorial with other surgeonfish
Captive bred
No
IUCN Red List
EX
EW
CR
EN
VU
NT
LC

Taxonomy

  1. Kingdom
    Animals
    Animalia
  2. Phylum
    Chordates
    Chordata
  3. Class
    Ray-finned Fishes
    Actinopterygii
  4. Order
    Perch-like Fishes
    Perciformes
  5. Family
    Surgeonfish
    Acanthuridae
  6. Genus
    Surgeonfish
    Acanthurus
  7. Species
    Epaulette Surgeonfish
    Acanthurus nigricauda Duncker & Mohr, 1929
  8. Synonyms
    Acanthurus gahm nigricauda Duncker & Mohr, 1929
    Acanthurus nigricauada Duncker & Mohr, 1929
  9. Source: GBIF | Global Biodiversity Information Facility

Care

Caring for the Epaulette Surgeonfish requires an understanding of its natural habitat. These fish are best kept in spacious aquariums that allow for ample swimming space. A tank with plenty of live rock will not only provide hiding spots but also serve as a substrate for algae growth, which forms a significant part of their diet.

Due to their active nature, these fish thrive in tanks with strong water movement that mimics ocean currents. Maintaining stable water conditions with efficient filtration is essential for their health and well-being.

Diet and Feeding

Epaulette Surgeonfish are primarily herbivorous, feeding on algae in the wild. In captivity, their diet should include a variety of marine algae, spirulina, and high-quality herbivore pellets. Supplementing their diet with occasional meaty foods like mysis shrimp can provide essential proteins.

Feed them several times a day in small amounts to mimic their natural grazing behavior and prevent overeating, which can lead to water quality issues.

Behavior and Compatibility

Generally peaceful, the Epaulette Surgeonfish can be a harmonious addition to community tanks. However, they can exhibit territorial behavior towards other surgeonfish, especially in confined spaces. Providing ample space and hiding spots can help mitigate aggression.

These fish are best kept with other peaceful species. They are compatible with a variety of reef-safe fish and invertebrates, making them suitable for diverse marine setups.

Health and Common Issues

With proper care, the Epaulette Surgeonfish can live for several years in captivity. It's important to monitor their health regularly, as they can be susceptible to common marine diseases such as ich. Quarantining new additions and maintaining high water quality are key preventative measures.

Habitat

Native to the Indo-Pacific region, the Epaulette Surgeonfish is commonly found in coral reefs and shallow lagoons. They favor environments with abundant algae and clear waters. In captivity, replicating these conditions with stable temperatures and moderate water flow is crucial for their health.

Conservation Status

Currently, the Epaulette Surgeonfish does not have a specific conservation status. However, maintaining sustainable practices in the aquarium trade is essential to prevent over-harvesting and ensure the species' long-term survival.