Caranx ignobilis is the largest of the trevallies or jacks, and although small specimens may be confused with other species such as Caranx lugubris, large specimens are unmistakable.
Details
§ 01
size
Common to 80 cm; max. 1.7 m
color
Adults mainly silvery grey to black above, usually paler below. No dark spot at upper end of opercle. Fins usually uniformly pigmented grey to black.
This species is found in abundance in all marine habitats, even to depths of 80 m. It is widespread, but tends to prefer hard bottoms. It forms loose schools and feeds mainly on fish, as well as cuttlefish, squids and crustaceans.
distinctive characters
The first dorsal fin has 8 spines, the second dorsal fin has 1 spine and 18-21 rays, the anal fin has 2 detached spines followed by 1 spine and 15-17 rays, and the gill rakers on the first gill arch including the rudiments are 20-24. The body depth is 2.7-3.8 in fork length, and there are strong scutes on the breast which is naked ventrally, typically with a small patch of prepelvic scales.