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Cardinalfish

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Cardinalfish
Photo by shahar chaikin · CC BY

About

Cardinalfish are small, big-mouthed reef fish that hide in the reef by day and come out at night. In this app the group includes the Ringtail Cardinalfish, the Banggai Cardinalfish, and the Flamefish.

How to tell it apart

Cardinalfish are easy to miss because they hide in dark cracks in the reef during the day and only come out at night. Look for the large mouth and the split dorsal fin, then check colour and pattern to tell the different kinds apart.

Appearance

Cardinalfish are small fish, most under 10 cm long, and are often brightly coloured. They have a large mouth and a dorsal fin split into two separate parts.

Did you know?

In at least some cardinalfish, the male carries the eggs in his mouth until they hatch, and he does not eat the whole time.

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