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This is a small marine fish that reaches 15 centimetres (5.9 in) in length. It is typically blue with a black margin on its back.
In the aquarium
The blue chromis should be bought in groups of odd numbers. It should be kept in a tank of at least 30 gallons. It is reef-safe and will not harm fish of similar size, though it may harass smaller fish if not fed enough.
- Froese, R. and D. Pauly, Eds. Chromis cyanea. FishBase. 2011.
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