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| Common names: jack (English), hojarán (Espanol), medregal (Espanol) |
Seriola peruana Steindachner, 1881
Elongate, fusiform, compressed; upper body profile more convex than lower profile; snout short, rounded; mouth ends just behind center of pupil, supramaxilla bone above top jawbone moderately wide; gill rakers (excluding rudiments) 30-34; dorsal fin with VII-VIII spines (front spines may be imbedded in very large fish), then a notch before I, 31-35; anal fin II isolated spines (reduced or embedded in large fish) + I, 20-22, its base much shorter than soft dorsal base; pectoral short (< head length); no isolated finlets after dorsal and anal fins; tail base with grooves on dorsal and ventral surface of tail fin base, but no lateral fleshy keel; lateral line with slight arch over pectoral region; no scutes (hard spiny scales) on lateral line.
Olivaceous to bluish on back, sides silvery to slightly bronzy; fins somewhat dusky; no bars or stripe on head or body. Juvenile: membranes of 2nd dorsal and anal fins dark.
Size: reaches at least 92 cm, common to 40 cm.
Habitat: coastal pelagic and demersal.
Depth: 0-30 m.
The SW Gulf of California to Chile, including the Galapagos and Malpelo.