Rhabdamia gracilisSlender cardinalfish | Arrow Cardinalfish | Graceful Cardinalfish | Luminous Cardinalfish
Translucent; almost transparent. Pale red patch on operculum behind eye, small black spot on tail base, and black tips on tail, often present in varying combinations. Forms small, dense schools in the water column in reef gutters.
Max Size: 6 cm
Sea Temperature Range: 17.4-31.2°C
Habitat Generalization Index: 1.12
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: Infrequent (4.1% 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: Large aggregations (1619 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