Also known as Black Cravalle, Black-tailed Trevally, Blue Runner, Common Jack, Green Jack, Horse Crevelle, Horse Mackerel, Horse-eye Jack, Jackfish, Kingfish, Pacific Crevelle Jack, Trevally, Yellow Cravalle, Yellow Jack.
Found singly, or in fast-moving schools, over shallow flats of coastlines, rivers and off-shore oceanic waters.
They feed on crustaceans, small fish, invertebrates.
Juveniles over sandy beaches, brackish estuaries and in seagrass beds.
Length - 124cm
Depth - 0-350m
Widespread Eastern Atlantic, Western Atlantic, Caribbean, Mediterannean
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/71