Pervagor janthinosoma

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Facts
Latin name Pervagor janthinosoma - (Bleeker, 1854)
Local name Blackbar filefish
Family Monacanthidae - Pervagor
Origin East Indian Ocean, West Indian Ocean, Australia, Japan, Indonesia, East Pacific, New Zealand, Central/West Pacific
Max length 13 cm (5,1")
As aquarium fish
Minimum volume 400 cm (106 gal)
Hardiness Average
Suitable for aquarium Experience, preparation and extra care required
Reef safe Reef safe with luck
Aggressiveness Might be aggressive towards similar species
Feed
Recommended Microalgea (Eg. spirulina)
Macroalgea (Eg. seaweed / nori)
Small crustaceans (Krill, mysis, artemia...)
Maybee Other invertebrates
Soft coral
Large polyp stone coral (LPS)
Beware of
Eats tubeworms

This species likes to eat tubeworms.

Can be a threat towards small crustaceans

This species can be a threat towards small crustaceans, e.g. small shrimp.

Fastidious

This species can be fastidious and in an aquarium it can be very difficult to get them to eat sufficiently.

Keep in mind
Frequent feeding

This fish requires feeding several times a day, especially when newly added.

When the fish can find its natural food in the aquarium it requires less frequent feeding. 

Hiding places

This species needs good hiding places, for example, between live rocks.

Docile

This species is very shy and docile, so one should be careful when keeping it with more aggressive fish.

Descriptions and further reading
Family description (Monacanthidae)

Filefish (Monacanthidae) have a very characteristic appearance, but whether one likes them or not is a matter of taste. 

Some species are suitable for aquaria, although they will occasionally eat a coral or invertebrate. They are therefore not so well suited to coral tanks.
They are often used to fight glass anemones (Aiptasia) and Majano anemones. Pervagor nigrolineatus is especially good at this.

They need peace and quiet from both the aquarist and other fish, when adjusting to the tank life.

Be careful when catching them, as they easily becomes caught in the net.

FishBase
Aquarium trade No
Distribution Indo-Pacific: East Africa to Samoa, north to southern Japan, south to New South Wales and Tonga.
English common names Ear-spot filefish
Blackbar filefish
References and further reading

About references

Henry C. Schultz. 2004. Files Not Meant For Your Toolbox (or Reef Aquarium!) - Reefkeeping Magazine - (English)

Dave Wolfenden. 2013. Filefish: A bit of rough! - Practical Fishkeeping - (English)
Scott W. Michael. Can You Add Filefish to a Reef Tank? - Fish Channel - (English)
Bob Fenner. Filefishes, Family Monacanthidae, Part I, Part II, Part III - Wet Web Media - (English)
Scott W. Michael. Those Fabulous Filefish - Tropical Fish Hobbyist Magazine - (English)