Yellow Jack
Carangoides bartholomaei
    Ecological Descriptors
Habitat Size (cm) Diet Behaviour Sex 
Dem, Co, R usu 50(to 100) Pisc Sh, I F
Adults:  Pale yellow-green-blue dorsally, becoming silver on the underside, often with a yellow cast.
Tail yellow. One of the major identification features is that the upper jaw does not extend  to the inferior margin of the eye. Can have blue dorsal bar and hencelook similar to Bar Jack (Caranx ruber), but distinguishable by dark band on upper dorsal peduncle.
Juvenile: With a dark, almost vertical,
bar through eye to mouth. Can take on mottled appearance.

Found around the edges of reefs and over soft and seagrass bottoms; juveniles in mangrovest depths between 0-50m(0-160ft). It usually occurs as a solitary species or in small groups, often around outer reefs (it is not common inshore). Adults feed primarily on bottom-dwelling fishes and small benthic crustaceans.

Life Cycle:
It reaches sexual maturity at 30 cm fork length (FL) in males and 32 cm FL in females. It exhibits group spawning behaviour closely resembling that of Permit. Schooling densely at 40-45m depth and subgroups of 5 to 8 fish then detach themselves from the school to spawn. Pelagic spawner thats eggs hatch into pelagic larvae.

Yellow Jack
Yellow Jack Juvenile
(C) Louis Johnson