Metallic blue marine bony fish with a large sail-like dorsal fin and a long and pointed bill-like snout. It is dark bluish-black on the upperparts and lighter on the sides, with about twenty bluish longitudinal bars along the flanks; the underparts are silvery white. The caudal fin is strongly forked. The fins are bluish-black and the front dorsal fin is speckled with small black spots. The bases of the anal fins are pale. The length of this fish is up to 3.15 m and the maximum weight is 58.1 kg.