Apogon semiornatus

Half-band cardinalfish | Oblique-band Cardinalfish | Three-band Cardinalfish
Apogon semiornatus
Apogon semiornatus, adult, Photo: Tom Davis
Apogon semiornatus
Apogon semiornatus, adult, NSW, Photo: Ian Shaw
1 / 2
Apogon semiornatus
Apogon semiornatus


Tropical Indo-Pacific


Semi-transparent body with wide black stripe from above eye through tail, and 2nd stripe from behind eye to anal fin. Usually also a red hue to face and base of fins.


Max Size: 8 cm

Sea Temperature Range: 17.2-30.6°C

Depth: 5-30m

Habitat Generalization Index: N/A

Also referred to as the SGI (Species Generalisation Index), this describes the habitat niche breadth of the species. Species with values less than 15 are found in a relatively narrow range of reef habitat types (specialists), while those over 25 may be found on most hard substrates within their range (generalists). Learn more here.

Conservation and Rarity

IUCN Status: Not Evaluated

Occurrence: Rare (0.3% of sites)

Occurrence describes how often the species is found on surveys within its distribution. It is calculated as the % of reef sites surveyed by RLS divers across all the ecoregions in which the species has been observed

Abundance: Solitary (1 per transect)

Abundance is calculated as the average number of individuals recorded per RLS transect, where present.

Edit by: RD Stuart-Smith, GJ Edgar, AJ Green, IV Shaw. 2015. Tropical Marine Fishes of Australia. Reed New Holland