Also known as Barrier Trevally, Black Ulua, Giant Kingfish, Giant Ulua, Goyan Fish, Great Trevally, Horse Mackerel, Horse Mackerel Trevally, Jackfish, Kingfish, Lowly Trevally, Trevally, White Ulua, Yellowfin Jack.
Found singly, over rock and sandy areas of clearwater lagoons and seaward reefs.
They feed nocturnally on large crustaceans and fish.
Juveniles found in estuaries.
Length - 170cm
Depth - 10-188m
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-ignobilis