Pervagor alternans, Adult, NSW, Australia, Photo: Ian Shaw
Pervagor alternans, NSW, Australia, Photo: Rick Stuart-Smith
Pervagor alternans, NSW, Australia, Photo: Tom Davis
Temperate Australasia, Tropical Indo-Pacific
Orange eye distinguishes it from P. janthinosoma (gillblotch leatherjacket) and Pervagor aspricaudus (not shown). Slowly retreats into reef crevices when approached.
Max Size: 16 cm
Sea Temperature Range: 16.3-29.3°C
Habitat: Coral Reef, Rocky Reef
Habitat Generalisation Index: 4.8
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
IUCN Threat Status: Not Evaluated
Occurrence: Frequent (13% 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: Few (2 per transect)
Abundance is calculated as the average number of individuals recorded per RLS transect, where present.
Edit by: extract from RD Stuart-Smith, GJ Edgar, AJ Green, IV Shaw. 2015. Tropical Marine Fishes of Australia. Reed New Holland