Ucla xenogrammus

Tripterygiidae
Largemouth Threefin, Largemouth Triplefin, Longjaw Threefin, Longjaw Triplefin
  • Ucla xenogrammus, Adult, QLD, Australia, Photo: Joe Shields
    Ucla xenogrammus, Adult, QLD, Australia, Photo: Joe Shields
  • Ucla xenogrammus, Juvenile, QLD, Australia, Photo: Joe Shields
    Ucla xenogrammus, Juvenile, QLD, Australia, Photo: Joe Shields
  • Ucla xenogrammus, Photo: Graham Edgar
    Ucla xenogrammus, Photo: Graham Edgar
  • Ucla xenogrammus, QLD, Australia, Photo: Joe Shields
    Ucla xenogrammus, QLD, Australia, Photo: Joe Shields
  • Ucla xenogrammus, Coral Sea, QLD, Photo: Andrew Green
    Ucla xenogrammus, Coral Sea, QLD, Photo: Andrew Green
  • Ucla xenogrammus, Great Barrier Reef, Cairns, QLD, Photo: Andrew Green
    Ucla xenogrammus, Great Barrier Reef, Cairns, QLD, Photo: Andrew Green
Distribution
Temperate Australasia, Temperate northern Pacific, Tropical Eastern Pacific, Tropical Indo-Pacific
Description
Long wide snout, lower jaw longer than upper jaw, thin red stripe broken by white segments along centre of body, helmet-like plate on head behind eyes with yellow and pink markings, body with oblique red and white bands composed of small spots. Similar Helcogramma gymnauchen also has extended lower jaw.
Information
  • Max Size: 5 cm
  • Sea Temperature Range: 24.1-30.6°C
  • Depth: 2-41 m
  • Habitat: Coral Reef
  • Habitat Generalisation Index: 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
  • 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: RD Stuart-Smith, GJ Edgar, AJ Green, IV Shaw. 2015. Tropical Marine Fishes of Australia. Reed New Holland
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