The greater amberjack (Seriola dumerili), also known as the allied kingfish, great amberfish, greater yellowtail, jenny lind, sea donkey, purplish amberjack, reef donkey, rock salmon, sailors choice, yellowtail, and yellow trevally, is a species of predatory ray-finned fish in the family carangidae, the jacks and pompanos.

The greater amberjack is a large predatory fish which has a body colouring which varies from brownish to bluish-grey on the dorsal surfaces contrasting with the silvery-white underparts.

[4] The shape of the body is elongated and fusiform and it is of moderate depth and laterally compressed, and has a covering of small cycloid scales.

In the eastern Atlantic Ocean, it has been recorded as a vagrant as far north as the British Isles and is found off in the Bay of Biscay south to Morocco and in the Mediterranean Sea.

It sometimes enters coastal bays, while the juveniles are infrequently recorded quite far well out to sea where they shelter among floating algae, such as Sargassum, and debris.

Common fish prey species include the bigeye scad (Selar crumenophthalmus) and sardines (Sardinella aurita and Sardina pilchardus).

[4] S. dumerli is gonochoric, meaning that the males and females are separate and determined at birth, and no sexual dimorphism exists other than size.

[9] The meat is used for sushi and sashimi in Japan,[4] while in Florida and Mexico, its flesh is marketed fresh and can be fried, broiled, baked, or grilled.

[6] Angling techniques used to catch greater amberjacks include trolling at the surface with various artificial lures and natural baits.

[10] The greater amberjack was formally described as Caranx dumerili by French naturalist Antoine Risso in 1810, with the type locality given as Nice, France.