Scientific Name Caranx ruber
Native To Subtropical and tropical areas of the western Atlantic (from Bermuda to Venezuela)
Habitat Lagoons and coral reefs
Diet Small fish, shrimp and cephalopods
Size and Age Up to 60 cm (23.6 in) long
The bar jack is an almond-shaped silvery fish with greyish-blue tints to it. It looks like other jacks, but gets its name from the distinguishing dark bar that runs down its back and into its caudal fin (tail), usually accompanied by a bright blue stripe. These fish are found either solitarily or in groups. As voracious and opportunistic predators, they follow bottom feeders such as stingrays or eels to find food hidden in the substrate.
Though harvesting might affect local populations of the bar jack, it does not seem to affect their population size.
- The genus of this species was recently changed from Carangoidesto to Caranx.
- During feeding and cleaning sessions, bar jacks can turn almost black in color—making their blue stripe almost invisible.