Turrum coeruleopinnatus

Characteristic features:

Colour:

Blue-green above, silvery grey below; small black spot above opercle; yellowish orange spots on side; dorsal, anal, and caudal fins dusky, pectoral fins pale yellow, pelvic fins pale grey.

Size:

Up to 41 cm TL.

Distribution:

Indo–West Pacific in tropical waters.

Habitat:

Rarely found close to shore, associated with reefs and sometimes seagrass beds, from 30 to 120 m depth.

Biology:

Generally solitary but sometimes found in small groups. 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 a second dorsal-fin lobe long, greater than head length (vs. short, less than head length in adults); gill rakers (including rudiments) on first gill arch 31–37 (vs. 21–27).

to Atropus armatus

Platycaranx chrysophrys
Longnose trevally

Platycaranx chrysophrys differs in having the profile of head gently sloped (vs. steep); head profile just above mouth vertical (vs. steep) and soft anal-fin rays 15–17 (vs. 18–19).

to Platycaranx chrysophrys

Carangichthys dinema
Shadow trevally

Carangichthys dinema differs in having brown blotches between bases of second dorsal-fin rays (vs. no markings); second dorsal-fin lobe never filamentous but long, greater than head length (vs. lobe long and filamentous in young, shortening to less than head length with age).

to Carangichthys dinema

Atropus hedlandensis
Bumpnose trevally

Atropus hedlandensis differs in having a bump on head profile level with the eyes becoming more pronounced with age (vs. no bump present); second dorsal-fin lobe long, greater than head length (vs. adults >25 cm TL with second dorsal-fin lobe short, less than head length) and males >16.5 cm FL with central rays long and filamentous (vs. second dorsal-fin central rays never filamentous).

to Atropus hedlandensis

Platycaranx malabaricus
Malabar trevally

Platycaranx malabaricus differ in having scaleless breast area long ventrally, extending to second anal-fin origin (vs. short ventrally, often extending to pectoral-fin base); scaleless breast area large, covering area above and in front of pectoral-fin base (vs. small, extending to pectoral-fin base only) and gill rakers (including rudiments) on first gill arch 32–38 (vs. 21–27).

to Platycaranx malabaricus

Carangichthys oblongus
Coachwhip trevally

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

to Carangichthys oblongus

Platycaranx talamparoides
Imposter trevally

Platycaranx talamparoides differs in a scaleless breast area long ventrally, often extending to second anal-fin origin (vs. short ventrally, often extending to distinctly behind pectoral-fin base); scaleless breast area large, covering area above and in front of pectoral-fin base (vs. small, extending to pectoral-fin base only) and gill rakers (including rudiments) in first gill arch 27–31 (vs. 21–27).

to Platycaranx talamparoides

FishBase
The IUCN Red List of Threatened Species^TM