Also known as Blue Mackerel, Cape Horse Mackerel, Common Scad, European Horse Mackerel, Horse Mackerel, Jack Mackerel, Pollock, Saurels, Scad, Western Horse Mackerel.
Found in large schools over sandy substrates in shallow to very deep waters of coastlines.
They feed on cephalopods, crustaceans and fish.
Length - 70cm
Depth - 0-1000m
Widespread Eastern Atlantic, Mediterranean
Jacks are fast swimming fish that can roam over great distances. The larger fish hunt other fish and the smaller fish eat zooplankton. In turn they are hunted by large Tuna and Dolphins. Ref: https://www.fishbase.se/summary/Trachurus-trachurus.html