Xanthichthys mento

Balistidae
Redtail Triggerfish, Redtail Triggerfish, Blue-throat Trigger, Crosshatch Triggerfish
  • Xanthichthys mento, Galapagos Islands, Ecuador, Photo: Graham Edgar
    Xanthichthys mento, Galapagos Islands, Ecuador, Photo: Graham Edgar
  • Xanthichthys mento, Galapagos Islands, Ecuador, Photo: Graham Edgar
    Xanthichthys mento, Galapagos Islands, Ecuador, Photo: Graham Edgar
Distribution
Tropical Eastern Pacific, Tropical Indo-Pacific
Description
Males yellow with black scale outlines creating a crosshatched pattern, a red tail with a bright blue sub-marginal line and 5 blue stripes on cheek. Females with crosshatch pattern but with blue to slate grey base colour and tail. Found in schools above outer-reefs and drop-offs, or around oceanic islands.
Information
  • Max Size: 29 cm
  • Sea Temperature Range: 20.6-29.8°C
  • Depth: 6-131m
  • Habitat: Coral Reef
  • Habitat Generalisation Index: 6.9
    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: 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 (7 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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