Convict Tang (Acanthurus triostegus)
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Convict Tang (Acanthurus triostegus)

This is a discussion on Convict Tang (Acanthurus triostegus) within the Acanthuridae (Tangs, Surgeons) forums, part of the Saltwater Fish Profiles category; --> Convict Tang Scientific Name: Acanthurus triostegus Family: Acanthuridae About the Convict Tang Species Type: Saltwater Fish Category: Tangs & Rabbitfish Care Level: Difficult. Healthy ...

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Convict Tang (Acanthurus triostegus)
Old 05-15-2013, 03:58 PM   #1
Convict Tang (Acanthurus triostegus)

Convict Tang

Scientific Name: Acanthurus triostegus
Family: Acanthuridae

About the Convict Tang

Species Type: Saltwater Fish
Category: Tangs & Rabbitfish

Care Level: Difficult. Healthy specimens may be difficult to find, as stress during shipping is normal. Triggering a feeding response in captivity may present a challenge, or meeting the dietary demands of the species may require special daily care. Is prone to disease, requiring high water quality. Proper acclimation and quarantine are essential, and the use of a UV Sterilizer is suggested. Recommended for advanced marine hobbyists only.
Origin: Hawaii
Compatibility/Temperament: The Convict Tang is typical of the Acanthurus genus. If successfully acclimated, they are generally a good community fish, provided they are given plenty of space and not kept with other members of the same genus. They also fare well in a reef environment with smaller fish that do not pose a threat. They will generally mix with Tangs outside of their genus, such as the commonly seen Sailfin Tang and Yellow Tang. When keeping more than one Acanthurus species of Tang, it is best to add them at the same time to a much larger aquarium.


The Convict Tang will not bother coral or invertebrates, however it may eat desirable marine algae. A difficult saltwater fish to acclimate to the home aquarium, they should only be kept by the most experienced saltwater fish keepers. For best chance of survival a quarantine period is an absolute must, and treating for internal parasites as a preventative is suggested.

After successfully acclimate a Convict Tang to your display tank, they are an active open water fish that will swim constantly, grazing on the sand and rock.

Convict Tang Diet

Feed a diet rich in vegetable matter including frozen herbivore foods, dried seaweed, or live macro algae. Freeze dried algae sheets should be offered daily.


Grows to appox 5'' in length.

Minimum Tank Suggestion

125 gallons

Ideal water parameters for Convict Tang

Marine fish are highly sensitive animals with very specific care requirements. Most all saltwater species will require similar water conditions, designed to replicate that of natural seawater. Ammonia and nitrite levels should absolute zero, temperature at 76F to 80F, and salinity at 1.024 to 1.026. Although some fish are tolerant of lower levels of Nitrate, the goal in every aquariums should be to keep Nitrate as close to zero as possible, and certainly under 20ppm. Finally, maintaining a stable pH of 8.0 to 8.4 is desired. Achieving this is made easier by monitoring alkalinity, which should be kept at 8-12 DKH, and calcium, which is targeted at 400 to 460ppm.

Contributing Members

The following members have contributed to this profile: Pasfur

Last edited by wake49; 05-16-2013 at 11:51 AM..
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