Bluish grey above, silvery white below with an amber stripe along midside of the body; fins dusky. Second dorsal and anal fins with low anterior lobe. It has a pointed head, relatively small eyes, and a large, terminally located mouth. A dark, diagonal stripe often runs from the snout, along the back to the first dorsal fin.
It looks like Seriola rivoliana (Almaco jack), Seriola fasciata (Lesser amberjack), and Seriola zonata (Banded rudderfish ), distinguishing features include the number of gill rakers and the length of the anal fin base. Seriola dumerili has 11-19 gill rakers, while the others have a higher count.