Yellowspotted Trevally Fish

The yellowspotted trevally is a large fish, growing to at least 1.2 m in length and reaching a recorded maximum weight of 18 kg.[5] Its body shape is like the jacks of the genus Caranx, being more elongated and subcylindrical than most of the other species of Carangoides.[6] As a juvenile, the fish is more subovate, becoming more elongated with age, with the dorsal profile of the head and nape becoming steeper with age also.[6] The dorsal fin is in two distinct parts, the first consisting of eight spines, while the second is composed of one spine and 25 to 30 soft rays, with the anterior lobe of this fin being shorter than the head length. The anal fin has two anteriorly detached spines followed by one spine attached to 21 to 26 soft rays and the pelvic fin has one spine and 18 to 19 soft rays.[7] The lateral line has a gentle anterior arch, which is slightly longer than the straight section of the lateral line, with the intersection below the 13th to 16th soft ray of the dorsal fin. The curved section contains 80 to 88 scales, while the straight section consists of 12 to 17 scales and 26 to 31 scutes.[7] The breast is scaleless until the origin of the pelvic fins and up to the origin of the pectoral fins, although some individuals have a narrow band of scales separating the pectoral fins. In adults, the mouth cleft is directly beneath the eye, with the both jaws containing bands of villiform teeth. It has 22 to 27 gill rakers in total and 24 vertebrae.[6]

The juveniles of the yellowspotted trevally are uniformly silver with a few golden spots above the lateral line, with the upper body becoming a more iridescent blue green with increasing age. At adulthood, many small golden to brassy spots occur above the midline with large individuals also having three irregular, indistinct dark blotches on the flank.[4] An inconspicuous dusky spot is usually seen on the operculum. The dorsal and anal fins are dusky yellow, with the anal fin having a whitish-blue leading edge and distal margin. The pectoral and caudal fins are olive-yellow, becoming dusky at the edges, while the pelvic fin is whitish-blue.[6]