Caranx melampygus
Bluefin Trevally | Blue Jack | Blue Jack Fish | Blue Trevally | Blue Ulua | Bluefin Kingfish | Bluefinned Crevalle | Spotted Trevally
Caranx melampygus, Coral Sea, Australia, Photo: Rick Stuart-Smith
Caranx melampygus, Coral Sea, Australia, Photo: Rick Stuart-Smith
Caranx melampygus, QLD, Australia, Photo: Toni Cooper
Caranx melampygus, Maldives, Photo: Rick Stuart-Smith
Caranx melampygus, French Polynesia, Photo: Rick Stuart-Smith
Similar Species
Distribution
Temperate Australasia, Tropical Eastern Pacific, Tropical Indo-Pacific
Description
Iridescent blue fins, olive back, body with dense covering of fine speckles of different colours, dark scutes. Differs from similar Carangoides orthogrammus (Thicklip Trevally) by having speckles instead of spots and a row of dark scutes starting between dorsal and anal fin lobes and extending onto tail base, with blue above.
Information
Max Size: 117 cm
Sea Temperature Range: 23.5-31.1°C
Depth: 0-190m
Habitat Generalization Index: 23.64
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.
Conservation and Rarity
IUCN Status: Not Evaluated
Occurrence: Common (23.1% 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 (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