Istigobius decoratus

Gobiidae
Decorated Sandgoby, Decorated Goby
  • Istigobius decoratus, NSW, Australia, Photo: Ian Shaw
    Istigobius decoratus, NSW, Australia, Photo: Ian Shaw
  • Istigobius decoratus, NSW, Australia, Photo: Ian Shaw
    Istigobius decoratus, NSW, Australia, Photo: Ian Shaw
  • Istigobius decoratus, Lizard Island, Great Barrier Reef, Australia, Photo: Sophie Edgar
    Istigobius decoratus, Lizard Island, Great Barrier Reef, Australia, Photo: Sophie Edgar
  • Istigobius decoratus, NSW, Australia, Photo: Ian Shaw
    Istigobius decoratus, NSW, Australia, Photo: Ian Shaw
Distribution
Temperate Australasia, Tropical Indo-Pacific
Description
Pale body with brown and white spots, upper body with dark scale edges forming a reticulated pattern, row of paired, fused black spots along body behind pectoral fin, with white spots in between. Similar Istigobius rigilius (Orangespotted Sandgoby) has paired spots that tend to be lighter brown and less highly fused, and overall paler coloration. Found on sand patches near reefs.
Information
  • Max Size: 13 cm
  • Sea Temperature Range: 20.0-31.3°C
  • Depth: 1-25 m
  • Habitat: Coral Reef, Soft sediment
  • Habitat Generalisation Index: 13.6
    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 (18% 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: Several (5 per transect)
    Abundance is calculated as the average number of individuals recorded per RLS transect, where present.
Edit by: Joe Shields
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