Fin's Fish Guide
The Diamond cardinal (Ostorhinchus apogonoides) is a saltwater fish of the family Apogonidae that grows up to 10 cm.
Description
The diamond cardinalfish is a small reef fish of the family Apogonidae from the western Pacific. The species reaches about 10 cm and has a semi-translucent, silvery body with two separate dorsal fins, typical of cardinalfishes. It inhabits rocky cliffs and sheltered coastal to outer reefs, from shallow flats to over 50 m deep, and is usually found in pairs or small groups. The fish is active at night and feeds on zooplankton and small invertebrates. Like other cardinalfishes the male broods the eggs in its mouth. The species is rather rarely seen.
Frequently asked questions
How do you recognise the Diamond cardinal?
The Diamond cardinal has an elongate, eel-like body, is mainly silver-grey and shows a plain pattern. Two separate dorsal fins; nocturnal and the male is a mouthbrooder.
Where does the Diamond cardinal live?
The Diamond cardinal lives in the sea (marine waters) and is mostly found around stony or rocky ground. Western Pacific, on reefs and rocky cliffs.
How big does the Diamond cardinal get?
The Diamond cardinal grows to a maximum of about 10 cm. On average the species is around 8 cm.
Is the Diamond cardinal dangerous to humans?
No, the Diamond cardinal is harmless to humans. None required: this species is harmless to humans.
Is the Diamond cardinal edible?
The Diamond cardinal is not usually eaten.
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All data
Identification
Appearance
Habitat & distribution
Behaviour & biology
For anglers
Safety
Status & sources
Same genus Ostorhinchus
More from the family Apogonidae
Want the complete picture on the Diamond cardinal?
Point your camera at the fish and Fin names the species in seconds. Free, and the Diamond cardinal is one of 12,519 species in the app.