The Zebra Tang, Acanthurus polyzona, is one of the least frequently seen surgeonfishes in the hobby, restricted to the Western Indian Ocean. The body is deeply compressed and pale silvery-white to gray, crossed by numerous broad dark vertical bars, and the caudal peduncle carries the scalpel-like spine typical of the genus. At a glance it recalls the Convict Tang, Acanthurus triostegus, but the dark bars sit more closely together and the natural range is far narrower. Adults reach roughly 8 inches.

Adult housing should begin at 125 gallons, with horizontal swimming length taking priority over depth. Build the layout around mature live rock that carries a standing crop of algae, since this fish grazes more or less continuously through the day. Sturdy rockwork with caves and swim-throughs gives the fish refuge and cruising routes, while the open sand and mid-water areas provide the uninterrupted lanes it patrols. Strong water movement, high oxygenation, and clear, stable tropical marine conditions suit the species well, and its care requirements place it in the moderate range rather than the beginner category.

In the wild, Acanthurus polyzona works over hard substrate and scrapes benthic microalgae from rock surfaces. A captive diet should follow that pattern closely. Dried marine algae and nori sheets, spirulina-based flakes and pellets, and formulated herbivore preparations all serve as staples, and algae-bearing live rock should remain available as a constant grazing surface. Mysis and brine shrimp are usually accepted, but meaty items belong in the rotation as an occasional supplement rather than a foundation.

Feed small portions several times per day, or clip seaweed where the fish can work on it over extended periods. This grazing rhythm matches the way the fish forages naturally and helps maintain body condition in a species that spends most of its waking hours searching for algae. No species-specific acclimation feeding problems are documented, though offering seaweed early gives a new arrival something familiar to focus on.

Dried Marine Algae Nori Sheets Spirulina Flakes Herbivore Pellets Mysis Shrimp Brine Shrimp
This is a diurnal, restless grazer that spends its day patrolling rockwork and holding to the middle and lower levels of the aquarium. Wild individuals sometimes occur in small hierarchical groups, but in captivity the species behaves territorially and can turn strongly aggressive toward conspecifics, other Acanthurus tangs, and fishes that carry a similar barred pattern. A single specimen is the safer choice in nearly all home systems. Mixing more than one would demand a very large aquarium, substantial visual barriers, and careful staged introductions.

Non-territorial community fishes that keep to their own part of the tank make the best companions; other surgeonfishes and combative species are poor matches. In the reef itself, the Zebra Tang is considered reef-safe and ignores corals and sessile invertebrates, and its steady grazing contributes to algae control on the rockwork. Documentation covers coral and sessile invertebrate compatibility specifically, so aquarists keeping ornamental shrimp, crabs, snails, or clams should observe a new specimen rather than assume behavior beyond what has been recorded.

FAQ

Frequently Asked Questions

About the Zebra Tang

  • How large an aquarium does a Zebra Tang need?
    Plan on at least 125 gallons for an adult, with horizontal swimming room as the priority. Mature live rock for grazing and strong water movement matter as much as raw volume.
  • Can a Zebra Tang be kept with other tangs?
    It can be highly territorial toward conspecifics, other Acanthurus tangs, and similarly barred fishes, so keeping a single specimen is the safer approach. Mixing tangs would require a very large aquarium, visual barriers, and careful introduction.
  • What should a Zebra Tang be fed?
    Build the diet around marine algae, nori, spirulina foods, and formulated herbivore preparations, with algae-bearing live rock available for grazing. Feed small portions several times daily or clip seaweed for extended grazing, and treat meaty foods as an occasional addition.