The genus name Chromis is derived from ancient Greek and means Fish or Perch. The genus was founded in 1814 by Cuvier.

In total, this genus contains about 107 species. They are part of the large family Pomacentridae, which also includes the Clownfish. The family Pomacentridae is further divided into subfamilies. Chromis falls in the subfamily Chrominae, along with the genera Acanthochromis, Altrichthys, Azurina, and Dascyllus.

Most Chromis varieties remain fairly small, are colourful and can withstand water conditions that are not always ideal. This makes them mostly fish that are also suitable for the novice marine aquarist.

Azurina cyanea - Blue Chromis

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