Poisson chirurgien bleu - Aquarium La Rochelle

Blue Tang

Paracanthurus hepatus
Conservation status :

Least concern

  • Group
  • Size
    20 centimetres
  • Distribution area

    The blue tang lives in the tropical part of the Indo-Pacific region, with the exception of the Red Sea.

this character

Surgeonfish derive their name from the blades like scalpels at the base of their tail.

In case of danger, they raise those blades to wound their assailants. The blue tang lives in coral reefs. It prefers areas with active currents and so can be found nearby the reefs' outer slopes and channels, at 2 to 40 m below surface.


The fish form into scattered groups that swim a few metres above the reefs. If they feel any danger, they hide amongst the branched coral. This is a diurnal fish that feeds on zooplankton and the microalgae that it scrapes off of rocks.


It would appear that groups of blue tang are made of one male and several smaller females.
Slight differences in colour can be seen
, depending on the geographic origin of the fish. For example, the belly is slightly yellowish in specimens from the Southern Indian Ocean.

« This fish is also known as the 'palette surgeonfish' for its black spot reminiscent of a painter's palette. »

The artist on stage

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