Species: Seriola rivoliana, Almaco Jack, Almaco Jack Amberjack

Seriola rivoliana Valenciennes in Cuvier & Valenciennes, 1833

Almaco Jack, Almaco Jack Amberjack

Body elongate, fusiform, relatively deep, compressed; upper head & body profile distinctly more convex that lower profile; snout long, pointed; mouth ends under center of pupil, supramaxilla bone above rear of top jawbone very wide at rear, with sharp angle at top corner; gill rakers (excluding rudiments) 24-29 in small fish, 18-25 in large; dorsal fin with VII-VIII spines (front spines may be imbedded in very large fish), then a notch before I, 27-33; anal fin II isolated spines (reduced or embedded in large fish) + I, 18-22, its base much shorter than soft dorsal base; front rays of dorsal and anal fins elongate, in a curved point, 2nd dorsal lobe height 16-25% of fork length; no finlets after 2nd dorsal and anal fins; pectoral short (< head length); tail base slender, with grooves on dorsal and ventral surface of tail fin base, but no lateral fleshy keel; tail strongly forked; lateral line with slight arch over pectoral region; no scutes (hard spiny scales) on lateral line.

Bluish to greenish on upper back, silvery below; oblique dark band from snout to front of dorsal fin; juveniles (up to 20 cm) with oblique dark bar on head and 7 dark bars (each with a narrow, irregular pale vertical centerline) on side and tail base that do not extend onto dorsal and anal fin bases.

Size: attains at least 160 cm, common to 60 cm; at least 60 kg.

Habitat: demersal and pelagic, mainly oceanic.

Depth: 3-340 m.

Circumtropical; Cape Cod to Argentina.