Amberjack, Greater Amberjack (often simply referred to as Amberjack)

The Greater Amberjack has an elongated, moderately compressed body. Its coloration is typically dark blue or blue-gray on the back and upper sides, fading to silver-white on the belly. A distinctive amber-colored stripe often runs diagonally from the snout to the first dorsal fin. It has a high, angular first dorsal fin and a longer, low second dorsal fin, followed by a series of finlets (though less prominent than tuna). The caudal (tail) fin is forked. The eye is relatively large. Young amberjack often have several dark vertical bars on their sides. They have small, smooth scales.

This species is primarily found in tropical and temperate waters worldwide, inhabiting rocky reefs, wrecks, and offshore structures. They can be found in depths ranging from near the surface to over 360 meters (1,200 feet). They prefer clear water and are often associated with areas that provide cover or current breaks.

As an active predator, the Greater Amberjack plays a significant role in its marine ecosystem. It feeds on a variety of smaller fish, squid, and crustaceans, helping to control populations of these organisms. Juveniles serve as prey for larger pelagic predators. Its presence indicates a healthy reef and offshore environment. It is a schooling fish, especially when young, and larger individuals may be more solitary or found in smaller groups around structures. The conservation status of the Greater Amberjack is classified as 'Least Concern' by the IUCN, though some regional populations may face localized pressure due to their popularity.

Similar looking species include other species within the genus Seriola, such as the Amberjack (Seriola rivoliana) which often has a deeper body and more rounded snout, and the Yellowtail Amberjack (Seriola lalandi) which typically has a more pronounced yellow lateral stripe and tail. Distinguishing features often involve the shape of the body, the presence and color of lateral stripes, and the shape of the dorsal fins.