Convict Tang - Acanthurus triostegus
Published August 6, 2019
Author: Mike - FishLore Admin
The Convict Tang is a member of the surgeonfishes and is one of the most peaceful of the available tangs. Convict Tangs will need at least a 75 gallon tank (284 liters), preferably larger, to allow for adequate swimming space. They can be fairly hardy once acclimated but will not do well in a tank that has not completed the aquarium nitrogen cycle. You will also need highly oxygenated water provided through increased surface agitation (multiple power heads or wave makers).
Convict Tangs are nicely colored with a white or yellow body and black vertical stripes. They are frequently found in large schools in the ocean and provided that you have a large enough tank, you may be able to keep multiple convict tangs in your saltwater aquarium. However, this Tang will probably not do well with other surgeonfish unless the tank is really large, 100 gallons (379 liters) or larger. This tang is one of the more peaceful of the bunch and may get picked on by other tangs that are already in the tank.
They should primarily eat marine algae and having lots of live rock in your tank will provide plenty of grazing opportunities in between meals. Try to give them a varied diet and supplement their diet with marine seaweed using a veggie clip.
They are somewhat disease resistant but you still need to take proper pre-cautions and use a quarantine tank before introducing them into your main tank. Keep them in the hospital tank for two weeks or so and watch for obvious saltwater diseases, like marine ich and make sure they are eating.
Convict Tang Care
Scientific Name : Acanthurus triostegus
Common Names : Convict Surgeonfish, Manini
Care Level : Easy to Moderate
Size : Up to 8 inches (20 cm)
Life span : 5 - 7 years or longer
pH : 8.1 - 8.4
Temperature : 75°F - 82°F (25°C - 28°C)
Specific Gravity : 1.020 - 1.025
Carbonate Hardness (dKH) : 8 - 12°
Origin / Habitat : Indo-Pacific, Hawaii
Temperament / Behavior : They may be aggressive with other convict tangs in smaller tanks but may do ok in multiples in larger tanks. In the ocean they are almost always found in large schools. They may get bullied by other surgeonfish. They also are constantly on the move and will need a larger tank for swimming space.
Breeding : Very difficult to breed in captivity.
Aquarium Size : 75 gallon (284 liters) minimum
Tank Mates : Use caution when selecting tank mates. Avoid keeping them with other species of tangs. Might be able to keep multiple tangs if you have a tank larger than 100 gallons. Introduce at the same time to limit territorial aggression.
Fish Disease : Saltwater Fish Disease - Diagnose, Symptoms and Treatment
Food : Primarily an herbivore and feeds on marine algae in the wild. Try to give your Convict Tang a variety of marine foods but predominantly marine algae. Having plenty of live rock for them to graze on goes will definitely help. They should accept vitamin enriched flake foods, frozen and definitely live foods.
Tank Region : All over
Gender : Difficult to determine the differences between males and females.
Forum : Tang Forum
Photo Credit : Photos copyright JJPhoto.dk
Still have Convict Tang questions?
Jump on the forum and ask your question!
Go here: Tangs - Surgeonfish Forum
More Tang & Surgeonfish Profiles
A pricey tang and often sought after by hobbyists. Don't mix with other tangs and keep them in large aquariums.
Red Sea Sailfin Tang
The Red Sea Sailfin can get quite large and needs a much larger tank than most hobbyists can provide.
One of the smallest available tangs is the Tomini Tang. This is an excellent reef friendly scavenger type fish.