Carangichthys oblongus

Characteristic features:

Colour:

Blue-green above, silvery below; small diffuse black spot above opercle sometimes present; small blue-black blotches on back between bases of second dorsal-fin rays; dorsal fin pale to yellowish; caudal-fin lower lobe yellowish, upper lobe dusky blue; anal, pectoral and pelvic fins pale yellow.

Size:

Up to 46 cm TL.

Distribution:

Indo-West Pacific in tropical waters.

Habitat:

Associated with coastal reefs as well as sand and rubble habitats. Juveniles found in estuaries.

Biology:

Occurs solitarily and in small schools. Little else is known about the biology and ecology of this species.

Indonesian fisheries:

Caught mainly by hook-and-line; also with gill nets and traps.

Similar species:

Atropus armatus
Longfin trevally

Atropus armatus differs in having the straight part of lateral line slightly shorter than curved part (vs. slightly longer) and scaleless breast area uninterrupted to scaleless pectoral-fin base (vs. scaleless breast area separated from scaleless pectoral-fin base by a narrow to moderate band of scales).

to Atropus armatus

Platycaranx chrysophrys
Longnose trevally

Platycaranx chrysophrys differs in having the straight part of lateral line slightly shorter than curved part (vs. slightly longer); no markings between bases of second dorsal-fin rays (vs. small blue/black blotches) and scaleless breast area uninterrupted to scaleless pectoral-fin base (vs. scaleless breast area separated from scaleless pectoral-fin base by a narrow to moderate band of scales).

to Platycaranx chrysophrys

Turrum coeruleopinnatus
Coastal trevally

Turrum coeruleopinnatus differs in having a head profile steep (vs. gently sloping); the second dorsal-fin lobe short, less than head length in adults (vs. long, greater than head length) and scaleless breast area long ventrally, extending to distinctly behind pelvic-fin origin (vs. shorter ventrally, extending to pelvic-fin origin).

to Turrum coeruleopinnatus

Carangichthys dinema
Shadow trevally

Carangichthys dinema differs in having the blotches between bases of second dorsal-fin rays brown in colour (vs. blue to black) and straight part of lateral line slightly shorter than curved part (vs. slightly longer).

to Carangichthys dinema

Atropus hedlandensis
Bumpnose trevally

Atropus hedlandensis differs in having no markings between bases of second dorsal-fin rays (vs. blue/black blotches); head profile very steep (vs. gently sloped) and a bump present on head profile level with the eyes, becoming more pronounced with age (vs. no bump).

to Atropus hedlandensis

Platycaranx malabaricus
Malabar trevally

Platycaranx malabaricus differs in having the second dorsal-fin lobe short, less than head length (vs. long, greater than head) and no markings between bases of second dorsal-fin rays (vs. blue/black blotches).

to Platycaranx malabaricus

Platycaranx talamparoides
Imposter trevally

Platycaranx talamparoides differs in having the second dorsal-fin lobe short, less than head length (vs. long, greater than head length); scaleless breast area extending to distinctly behind pelvic-fin origin (vs. extending to pelvic-fin origin) and a scaleless breast area uninterrupted to scaleless pectoral-fin base (vs. scaleless breast area separated from scaleless pectoral-fin base by a narrow to moderate band of scales).

to Platycaranx talamparoides

FishBase
The IUCN Red List of Threatened Species^TM