Pterocaesio digramma, Great Barrier Reef, Cairns, QLD, Photo: Andrew Green
Pterocaesio digramma, Adult, NSW, Australia, Photo: Ian Shaw
Pterocaesio digramma, Torres Strait, QLD, Photo: Andrew Green
Pterocaesio digramma, Night. Raja Ampat, Indonesia, Photo: Andrew Green
Distribution
Temperate Australasia, Tropical Indo-Pacific
Description
Slender silver-blue body, two narrow yellow stripes along body, the lower stripe extending from upper eye to tail base is below lateral line for most of the length of the body, only crossing near tail base, and dark tail tips. Similar P. marri (Bigtail Fusilier) has yellow stripe covering lateral line for most of body length rather than below it. Often schools with other fusiliers.
Information
Max Size: 30 cm
Sea Temperature Range: 20.1-31.2°C
Depth: 0-50m
Habitat: Coral Reef
Habitat Generalisation Index: 14.6
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
Rarity
IUCN Threat Status: Not Evaluated
Occurrence: Frequent (17% 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 (116 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
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