jack mackerel


Definition of jack mackerel

  1. :  any of several medium to large food and sport fishes (genus Trachurus): such asa :  a fish of the northern Pacific Ocean (Trachurus symmetricus) that is iridescent green or bluish above and silvery belowb :  a fish of the southern Pacific Ocean (Trachurus murphyi) that was formerly considered a subspecies (T. symmetricus murphyi) of the northern Pacific jack mackerelc :  a fish (Trachurus novaezelandiae) of Australian and New Zealand waters that has a yellow tail fin


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