Body fusiform and elongate, with a raised profile of the head that extends to the dorsal fin. The first dorsal fin has seven long spines that retract into a groove; it may have a signal function, or it may be used in maneuvering when attacking prey. A second dorsal fin has 25-28 soft rays. There are three spines and 15-17 soft rays in the anal fin. The caudal fin is forked. Body color is blue dorsally and silvery white ventrally. There are black stripes positioned obliquely on the dorsal surface; one runs up onto the upper lobe of the caudal fin. Grows to nearly 65 in (165 cm) in length, with a weight of nearly 115 lb (52 kg).
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