Choerodon cyanodus

Labridae
Blue Tuskfish, Bluebone Groper, Grey Tusk-fish, White Spot Tuskfish
  • Choerodon cyanodus, Adult, Enderby Island, WA, Australia, Photo: Graham Edgar
    Choerodon cyanodus, Adult, Enderby Island, WA, Australia, Photo: Graham Edgar
  • Choerodon cyanodus, Northern Great Barrier Reef, QLD, Photo: Rick Stuart-Smith
    Choerodon cyanodus, Northern Great Barrier Reef, QLD, Photo: Rick Stuart-Smith
  • Choerodon cyanodus, Marchinbar Is, Northern Territory, Photo: Ian Shaw
    Choerodon cyanodus, Marchinbar Is, Northern Territory, Photo: Ian Shaw
  • Choerodon cyanodus, Adult, Enderby Island, WA, Australia, Photo: Rick Stuart-Smith
    Choerodon cyanodus, Adult, Enderby Island, WA, Australia, Photo: Rick Stuart-Smith
Distribution
Tropical Indo-Pacific
Description
Greenish-grey body, blue line on lower jaw, pale bar behind head and pectoral fin, sometimes short dark bars in series on back, round white patch below rear of dorsal fin, blue fin margins, and indistinct stripes on tail base. Lacks blue lines on face of similar Choerodon species. Sheltered and silty reef with macroalgae or seagrass nearby.
Information
  • Max Size: 70 cm
  • Sea Temperature Range: 21.5-31.8°C
  • Depth: 0-36 m
  • Habitat: Coral Reef, Rocky Reef, Seagrass
  • Habitat Generalisation Index: 24.7
    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
  • Threats: Exploitation, Habitat degradation
  • IUCN Threat Status: Least Concern
  • Occurrence: Common (26% 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 (4 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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