Trachichthys australis

Trachichthyidae
Roughy
  • Trachichthys australis, Sydney, NSW, Photo: Andrew Green
    Trachichthys australis, Sydney, NSW, Photo: Andrew Green
  • Trachichthys australis, Jervis Bay, NSW, Photo: Andrew Green
    Trachichthys australis, Jervis Bay, NSW, Photo: Andrew Green
  • Trachichthys australis, NSW, Australia, Photo: Ian Shaw
    Trachichthys australis, NSW, Australia, Photo: Ian Shaw
Distribution
Temperate Australasia
Description
Rounded body, reddish brown colour, and white and dark markings on opercles and fins. It is occasionally caught by line. The species releases a toxic white substance through pores in the skin as a defensive measure when captured.
Information
  • Max Size: 15 cm
  • Sea Temperature Range: 12.3-23.5°C
  • Depth: 1–30 m
  • Habitat: Rocky Reef
  • Habitat Generalisation Index: 2.6
    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 (11% 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: GJ Edgar. 2008. Australian Marine Life. New Holland, Sydney
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