Description

Also known as Black Jack, Blue Runner Jack, Bluestripe Jack, Crevalle, Egyptian Scad, Golden Jack, Green Jack, Hardtail, Hard-tailed Jack, Horse Mackerel, Jackfish, Mackerel, Runner, Trevally, Whiteback Cavalli, Yellow Mackerel, Yellowtail Cavalli.

Found in schools, over brackish waters, of coastal reefs.
They feed on fish and invertebrates.
Juveniles found floating amongst Sargassum weeds.
Length - 70cm
Depth - 0-100m
Widespread Eastern Atlantic, Caribbean, Mediterranean, Eastern Pacific

Often used as baitfish.

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/Caranx-crysos.html