Also known as Double-dotted Queenfish, Double-spotted Queenfish, Giant Dart, Giant Leatherskin, Giant Queenfish, Giant Trevally, Largemouth Queenfish, Leatherjacket, Leatherskin, Queenfish, Queenie, Skinny, Skinnyfish, Talang Leatherskin, Trevally, Whitefish.
Found in small schools around estuaries, and coastal waters of reefs and offshore islands.
They feed on cephalopods, fish and small invertebrates.
Length - 120cm
Depth - 0-50m
Widespread Indo-West Pacific
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/1950