Common name: Black-barred Surgeonfish

General Information

The Black-barred Surgeonfish, scientifically known as Acanthurus polyzona, is a striking species known for its distinctive black and white striped pattern, hence its common name "Multibar Surgeonfish". This species is popular among aquarists for its unique appearance and active swimming behavior, making it a fascinating addition to larger marine aquariums.

One notable distinction between the Black-barred Surgeonfish and similar species, such as the Acanthurus triostegus, is the number and thickness of their vertical stripes. The Black-barred Surgeonfish has seven thicker, closely spaced black bars on its body, while the Convict Tang typically has six thinner, more spaced-out bars. This visual difference is a key identifying feature when distinguishing between the two species.

While not as commonly found in the aquarium trade as some other tangs, the Black-barred Surgeonfish is valued for its algae-eating habits, which can help control algae growth in home aquariums. Its role in maintaining the ecological balance of reef systems highlights its importance in both hobbyist and conservation circles.

Care

Black-barred Surgeonfish require spacious aquariums due to their active nature and potential size. A minimum tank size of 300 liters is recommended, with plenty of swimming space and live rock for grazing. They thrive in environments that mimic their natural reef habitats, with stable water parameters and moderate to strong water flow.

Providing a varied diet rich in marine-based algae and supplemented with quality flake or pellet foods will ensure optimal health. Regular feeding and maintaining stable water conditions are crucial for their well-being.

Diet and Feeding

In their natural habitat, Black-barred Surgeonfish primarily graze on algae. In captivity, they should be offered a diet that replicates this, including dried seaweed, spirulina, and algae-based pellets. Supplementing with occasional meaty foods like mysis shrimp can provide additional nutrition.

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

Behavior and Compatibility

Black-barred Surgeonfish are generally peaceful but can exhibit territorial behavior, especially towards other tangs. They are best kept with other peaceful species and should not be housed with overly aggressive fish that might stress them.

They are social fish that do well in community tanks with other non-aggressive species. However, care should be taken when introducing them to tanks with other tangs, as they may become territorial.

Reproduction

Breeding Black-barred Surgeonfish in captivity is challenging and rarely documented. They are pelagic spawners, releasing eggs and sperm into the water column. Successful breeding would require a large, specialized setup to accommodate their spawning behavior.

Health and Common Issues

With proper care, Black-barred Surgeonfish can live for several years in captivity. Key to their health is maintaining stable water conditions and providing a balanced diet.

When selecting a Black-barred Surgeonfish, look for active individuals with clear eyes and vibrant coloration. Avoid fish that appear lethargic or have visible signs of disease.

Common health issues include susceptibility to marine ich and other parasitic infections. Quarantine new additions and maintain good water quality to minimize health risks.

Habitat

Black-barred Surgeonfish are native to the Indian Ocean, particularly around the islands of the Seychelles and Mauritius. They inhabit coral reefs and lagoons, thriving in environments with abundant algae growth.

This species is considered rarer in the aquarium trade compared to more common tangs like the Convict Tang, largely due to its more limited geographic range. The limited availability of Black-barred Surgeonfish in the hobby adds to their appeal among experienced aquarists. Ensuring the replication of their natural habitat, including warm tropical waters and plenty of live rock for grazing, is crucial for their well-being in captivity.