Gymnosarda unicolor

Scombridae
Dogtooth Tuna, Dog Tuna, Peg-tooth Tuna, Scaleless Tuna, White Tuna, White-flesh Tuna
  • Gymnosarda unicolor, Photo: Rick Stuart-Smith
    Gymnosarda unicolor, Photo: Rick Stuart-Smith
  • Gymnosarda unicolor, Seychelles, Photo: Rick Stuart-Smith
    Gymnosarda unicolor, Seychelles, Photo: Rick Stuart-Smith
Distribution
Tropical Indo-Pacific
Description
Torpedo-shaped, two-tone body, grey-blue on back and silver below. White tips on dorsal and anal fins, black tips on tail, obvious lateral line which dips down to lower body at mid body and large mouth with large teeth. Found along walls, bommies and reef passes near deep water.
Information
  • Max Size: 248 cm
  • Sea Temperature Range: 22.3-31.4°C
  • Depth: 10-250 m
  • Habitat: Coral Reef, Rocky Reef
  • Habitat Generalisation Index: 2.8
    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
  • IUCN Threat Status: Least Concern
  • Occurrence: Infrequent (2% 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: Solitary (1 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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