Trachurus japonicus (Temminck & Schlegel, 1844)
Japanese jack mackerel
photo by Shao, K.T.

Family:  Carangidae (Jacks and pompanos), subfamily: Caranginae
Max. size:  50 cm TL (male/unsexed); max.weight: 660.0 g; max. reported age: 12 years
Environment:  pelagic-neritic; marine; depth range 0 - 275 m, oceanodromous
Distribution:  Northwest Pacific: southern Japan, Korean Peninsula to the East China Sea. Pacific Ocean off the coast of southeast Asia.
Diagnosis:  Dorsal spines (total): 9-9; Dorsal soft rays (total): 30-35; Anal spines: 3-3; Anal soft rays: 26-30; Vertebrae: 24-24. Species with no finlets and the entire lateral line with scutes (69-73) (Ref. 41299).
Biology:  Adults occur on continental waters (Ref. 41299). Pelagic (Ref. 52947). Juveniles associate with drifting seaweed (Ref. 12114, 12115).
IUCN Red List Status: Near Threatened (NT); Date assessed: 20 July 2017 (A2bd) Ref. (130435)
Threat to humans:  harmless


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