Japan Surgeonfish (Acanthurus japonicus)

From The Aquarium Wiki
Jump to: navigation, search

Japan Surgeonfish

Acanthurus japonicus453.jpg
Japan Surgeonfish

Acanthurus japonicus

473 Litres (125 US G.)

17.8-20.3cm (7-8 ")


8.1 - 8.4

22.2-25.6°C (72 -78 °F)

8-12 °d

1:1 M:F

Flake Foods
Other (See article)

8-10 years



Additional names

Japan Surgeonfish, White-Faced Surgeonfish, White-Nose Surgeonfish

Additional scientific names

Hepatus aliala japonicus


These fish are difficult to sex visually.


Marine algae as well as meaty foods.

Tank Compatibility[edit]

Reef safe although sometimes aggressive, especially when housed in too small of a system. It is best to avoid housing this fish with other Surgeons unless the system is very large. Being one of the more aggressive Tangs, it is best to only house it with semi-aggressive species or fish that can hold their own.

Environment Specifics[edit]

A spacious, mature, and stable tank with established live rock for grazing. Very high current is crucial for the long term success of this fish, due to it being found in strong surge zones in the wild. Without this, it will pace the tank nervously until it injures itself fatally on the tank decor. The stressed fish will likely contract a parasite in the process, and bring the rest of the tank down with it. However, it does tend to be the hardiest/most forgiving of the "Powder" Tangs.


This fish can be very tough to differentiate from the closely related Acanthurus nigricans. The Japan Surgeonfish has a white patch that extends from below the eye down to the mouth, whereas the Goldrim Tang's white patch is only present below the eye, not reaching down to the mouth.


External links[edit]