profile more convex than the ventral profile, with the head profile also slightly convex. The dorsal fin is divided into two distinct sections, the first containing 8 spines, while the second consists of 1 spine and 20 to 22 soft rays, with the lobe of this second fin being elongate and longer than the head length. The anal fin consists of 2 anteriorly detached spines followed by 1 spine attached to 18 or 19 soft rays, while the pelvic fin has 1 spine followed by 18 or 19 soft rays. The lateral line has a moderate anterior arch, with the chord of this arch slightly shorter than the straight section, another feature which separates C. oblongus from C. dinema. The curved section of the lateral line has 60 to 69 scales while the straight section has 0 to 2 scales and 37 to 42 scutes. The breast is scaleless, reaching ventrally to the pelvic fin origin, while laterally the naked breast is separated from the naked base of the pectoral fins by a band of scales. Both jaws contain bands of small teeth, with the bands becoming wider anteriorly. The upper jaw also hosts an irregular series of moderately large outer teeth, with the largest specimens showing this in the lower jaw as well. There are 26 to 30 gill rakers and 24 vertebrae. The coachwhip trevally is a dusky olive green colour above, fading to a silvery white or yellow below with small blue to black blotches present on the dorsal line between the bases of the second dorsal fin rays. The upper caudal and soft dorsal fins are dusky blue, while the anal fin is yellow having white lobe tips. The pelvic and pectoral fins are yellow. There is a diffuse dark opercular blotch, which may be absent altogether. Distribution and habitat The coachwhip trevally is distributed throughout the tropical and subtropical regions of the Indian and west Pacific Oceans. In the Indian Ocean, the species ranges from South Africa and Madagascar in the west, northward to the Gulf of Aden, but no records exist of captures in the Red Sea or further north until India and Sri Lanka. In the eastern Indian Ocean, it is known from China, South East Asia, Indonesia and northern Australia. In the Pacific its range extends from Papua New Guinea north to Taiwan and Japan and east to New Caledonia and Fiji.