Acanthurus leucosternon

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Facts
Latin name Acanthurus leucosternon - Bennett, 1833
Local name Powder Blue Tang
Family Acanthuridae - Acanthurus
Origin East Indian Ocean, Indonesia
Max length 30 cm (11.8")
As aquarium fish
Minimum volume 900 l (237 gal)
Hardiness Delicate
Suitable for aquarium Experience, preparation and extra care required
Reef safe Always reef safe
Aggressiveness Aggressive towards similar species
Feed
Recommended Macroalgea (Eg. seaweed / nori)
Microalgea (Eg. spirulina)
Small crustaceans (Krill, mysis, artemia...)
Beware of
High water quality

This species demands a high water quality.

Amongst other things it means, that water must be properly oxygenated.

Subsceptible to ich

This species is easily susceptible to Marine Ich (Cryptocaryon irritants), when stressed by other fish, bad water quality, or when relocated.

Aggressive

This species can be extremely aggressive towards other fish.

Be careful when keeping these fish together with peaceful or docile species. Regular feeding, plenty of hiding places and a lot of space can alleviate aggressive behavior to some degree.

Keep in mind
Sensitive during transportation

This species is very sensitive during transportation and acclimatizing into the aquarium.

Well established aquarium with algae

These fish should be kept in a well run aquarium where they can "graze" algae from rocks and stones.

If there are insufficient algae on the rocks, it is important to feed more frequently and supplement with algae rich food e.g. Spirulina. 

Requires plenty of space for swimming.

This species revels in swimming and requires an aquarium with ample space.

Hiding places

This species requires places to hide, especially when newly introduced into the aquarium.

Algae Eaters

Even though these fish enjoy a diverse type of frozen foods, it is imperative that its primary food, is algae based, thus ensuring that the fish`s immune system remains healthy.

This can, for example, be plant based fish flakes, Nori seaweed or similar.

Descriptions and further reading
Genus description (Acanthurus)

Some species in the Acanthurus genus mimic various Angelfish as juvenile, since predatory fish know that small Angelfish are hard to catch. They are therefore difficult to identify from a picture of adult fish.

Acanthurus species often place higher demands on: tank size, surroundings and water quality, than fish in the genus Zebrasoma.

Family description (Acanthuridae)

Surgeonfish (Acanthuridae) live primarily of different types of algae, making it a popular choice for coral aquariums, as they help to keep the aquarium algae free.

Most Surgeonfish have a scalpel by the caudal fin, used to defend themselves. It can cause some deep lacerations, so pay attention if the fish start to fight and when handling the fish.

When in the aquarium, they will spend most of their time swimming around and nibbling the algae from the stones. Surgeonfish will rarely irritate corals or invertebrates. Large Palettes/Blue tangs can be an exception.

The Surgeonfish are not typically aggressive towards other types of fish. If more Surgeonfish are added to the aquarium, they will establish a hierarchy. It is best to add the most aggressive species last and to ensure that there are sufficient hiding places, as they prefer to have their own individual sleeping area.

If multiple aggressive species are added to the same aquarium, one runs the risk of one of them dying due to stress. One must therefore be cautious about adding multiple Acanthurus species or Zebrasoma xanthurum into the same aquarium. A combination of the different genera will normally get along well, although the more aggressive species can still be challenging.

FishBase
Aquarium trade Yes
Distribution Indian Ocean: eastern Africa to the Andaman Sea, southwest Indonesia and Christmas Island; with range extended to Bali, Indonesia in Western Pacific (Ref. 37792).
Danish common names Hvidstrubet kirurgfisk
English common names Powder-blue surgeonfish
Powderblue surgeonfish
Powder-blue tang
References and further reading

About references

Bob Fenner. The Tangs, Surgeons, Doctorfishes, of the Genus Acanthurus Part 1, Part 2 - Wet Web Media - (English)
Bob Fenner. The "Bad", Unknown and Just Too Dang Big Tangs, Surgeons, Doctorfishes, of the Genus Acanthurus - Wet Web Media - (English)

James W. Fatherree. 2009. Aquarium Fish: Surgeonfishes, A.K.A. the Tangs - Advanced Aquarist - (English)
Bob Fenner. Surgeons, Tangs and Doctorfishes, Family Acanthuridae - Wet Web Media - (English)
2013. Kirurgfisk - Saltvandswiki - (Danish)