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The coastal trevally is similar in body to most other jacks, having a nearly ovate, strongly compressed body, with the dorsal profile more convex than the ventral profile, with a moderately curved nape. It is moderately large, growing to a recorded maximum of 40 cm, although more commonly seen at around 25 cm. The dorsal fin is divided into two distinct sections, the first consisting of 8 spines, with the second consisting of a single spine followed by 20 to 23 soft rays. The lobe of the second dorsal fin is filamentous in juveniles, becoming shorter with age until at the adult stage, the lobe is shorter than the head length and the anal fin lobe. The anal fin consists of 2 detached spines followed by 1 spine anterior to 16 to 20 soft rays. The pelvic fin contains a single spine and 18 to 20 soft rays. The lateral line has a moderate anterior arch, with the junction of the curved and straight section below the 12th to 14th dorsal ray. The straight section of the lateral line contains 16 to 20 scutes, with the lateral line having 31 to 50 combined scales and scutes over its entire length. The breast is devoid of scales ventrally to behind the pelvic fin origin and up to the pectoral fin base, although in rare cases this is interrupted by a lateral band of scales. Both jaws contain bands of villiform teeth, with the bands becoming wider anteriorly. There are a total of 21 to 27 gill rakers and 24 vertebrae. In life, the coastal trevally is bluish green above,...
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