Monotaxis heterodon

Lethrinidae
Redfin Emperor, Redfin Emperor, Redfin Seabream
  • Monotaxis heterodon, Adult, Maldives, Photo: Rick Stuart-Smith
    Monotaxis heterodon, Adult, Maldives, Photo: Rick Stuart-Smith
  • Monotaxis heterodon, Juvenile. Photo: Rick Stuart-Smith
    Monotaxis heterodon, Juvenile. Photo: Rick Stuart-Smith
  • Monotaxis heterodon, QLD, Australia, Photo: Rick Stuart-Smith
    Monotaxis heterodon, QLD, Australia, Photo: Rick Stuart-Smith
  • Monotaxis heterodon, Cook Islands, Photo: Graham Edgar
    Monotaxis heterodon, Cook Islands, Photo: Graham Edgar
  • Monotaxis heterodon, Juvenile, QLD, Australia, Photo: Rick Stuart-Smith
    Monotaxis heterodon, Juvenile, QLD, Australia, Photo: Rick Stuart-Smith
  • Monotaxis heterodon, Raja Ampat, Indonesia, Photo: Graham Edgar
    Monotaxis heterodon, Raja Ampat, Indonesia, Photo: Graham Edgar
Distribution
Tropical Indo-Pacific
Description
Silvery body with a dark back, narrow white bars on upper body, red tinge to fins and often a yellow tail. Similar to M. grandoculis (Bigeye Seabream) but with narrower upper body bars (2 scales wide rather than 3-4), smaller size, and dark colouration extending further down side of body. Not always recognised as a distinct species from M. grandoculis.
Information
  • Max Size: 60 cm
  • Sea Temperature Range: 25.4-30.7°C
  • Depth: 3-25m
  • Habitat: Coral Reef, Rocky Reef
  • Habitat Generalisation Index: 15
    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: Common (28% 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 (5 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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