Also known as Brassy Kingfish, Greenback Trevally, Papuan Trevally, Tealeaf Trevally, Trevally.
Found singly or in schools, swimming high in the water column, over lagoons and seaward reefs, sometimes entering rivers.
They feed on fish.
Juvenile found in estuaries.
Length - 88cm
Depth - 0-50m
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/6360