Skip to content
Convict tang, photographed on a transparent background

ReefIn the market300 coinsCommon

Convict tang

Acanthurus triostegus

The exception among tangs: it really does sweep the rock in a school.

The Convict tang (Acanthurus triostegus) is a tropical marine fish of the family Acanthuridae. It lives on and around reefs, between 0 and 90 m deep. Adults grow to about 18 cm; the largest on record measured 27 cm (total length). In the aquarium it needs a tank at least 150 cm long and water at 23–27 °C.

Size
18 cm
Smallest tank
150 cm
Temperature
23–27 °C
Care
Moderate

In the aquarium

Temperature23–27 °C
pH7.8–8.5
Temperament
Semi-aggressive
Diet
Herbivore
Activity
Busy
Water layer
Mid water
Group
Happiest in a group of 3 or more
Coral
Reef safe
Drawn to scale in a 150 cm tank

These values are compiled from real species data, and the LumaReef simulation is built to keep them true to life.

Which tank it fits

  • Nano60 cm · 65 litresToo small
  • Standard90 cm · 180 litresToo small
  • Wide120 cm · 300 litresToo small
  • Living room180 cm · 650 litres25 of them
  • Showcase250 cm · 1,200 litres46 of them
  • Gallery300 cm · 1,440 litres55 of them

Who it lives with

In the wild

Water type
Marine
Climate zone
Tropical
Habitat
Coral and rocky reefs
Largest on record
27 cmtotal length
Aquarium trade
Traded commercially

Depth

Conservation status

Classification

  1. OrderAcanthuriformes
  2. FamilyAcanthuridae
  3. GenusAcanthurus
  4. SpeciesAcanthurus triostegus

In other languages

English
Convict Surgeonfish
German
Gitter-Doktorfisch
Spanish
cirujano convicto
French
Chirurgien bagnard
Italian
Pesce chirurgo zebra
Russian
Полосатый хирург
Japanese
シマハギ
Chinese
綠刺尾鯛

Quick answers

Convict tang size: how big does it get?
Adults reach about 18 cm. The largest on record measured 27 cm (total length). Record sizes among the 20 Acanthurus species on LumaReef: 12.2 cm (Blueline Surgeonfish) to 70 cm (Yellowfin Surgeonfish).
Convict tang tank size: what is the minimum?
A tank at least 150 cm long. In LumaReef that is the Living room tank or larger.
Convict tang water parameters: what does it need?
Temperature 23–27 °C, pH 7.8–8.5. Close to what most Acanthuridae on LumaReef need (23–27 °C).
Convict tang tank mates: what can it live with?
It gets along with 42 of the 99 reef species in the catalogue, such as Regal angelfish, Foxface rabbitfish, and Maroon clownfish.
Convict tang: alone or in a group?
Keep at least 3 together.
Convict tang and corals: is it reef safe?
Yes, it leaves corals alone.
Convict tang depth: how deep does it live?
In the wild, 0 to 90 m down. Deeper than most Acanthurus on LumaReef (1–40 m).

All Acanthuridae speciesAll species A–Z

Sources

Convict tang: compiled from these references.