Chelmon marginalis

Chaetodontidae
Margined Coralfish
  • Chelmon marginalis, Gulf of Carpentaria, QLD, Photo: Rick Stuart-Smith
    Chelmon marginalis, Gulf of Carpentaria, QLD, Photo: Rick Stuart-Smith
  • Chelmon marginalis, Juvenile, Shark Bay, WA, Photo: Rick Stuart-Smith
    Chelmon marginalis, Juvenile, Shark Bay, WA, Photo: Rick Stuart-Smith
  • Chelmon marginalis, Gulf of Carpentaria, QLD, Photo: Andrew Green
    Chelmon marginalis, Gulf of Carpentaria, QLD, Photo: Andrew Green
  • Chelmon marginalis, Adult, Northern Territory, Australia, Photo: Ian Shaw
    Chelmon marginalis, Adult, Northern Territory, Australia, Photo: Ian Shaw
  • Chelmon marginalis, Dampier, WA, Photo: Graham Edgar
    Chelmon marginalis, Dampier, WA, Photo: Graham Edgar
Distribution
Tropical Indo-Pacific
Description
Two parallel black-edged orange bands on head and incomplete band on rear of body. C. rostratus (beaked coralfish) occurs only in the Pacific, and has 4 bands. Juveniles of C. marginalis have 4 bands but can be identified by Australian distribution west of Torres Strait.
Information
  • Max Size: 18 cm
  • Sea Temperature Range: 21.5-32.4°C
  • Depth: 1-30m
  • Habitat: Coral Reef, Soft sediment
  • Habitat Generalisation Index: 20.8
    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
  • IUCN Threat Status: Least Concern
  • Occurrence: Common (23% 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: RD Stuart-Smith, GJ Edgar, AJ Green, IV Shaw. 2015. Tropical Marine Fishes of Australia. Reed New Holland
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