Caranx melampygus Cuvier in Cuvier & Valenciennes, 1833
Bluefin trevally, Bluefin crevalle-jack
Body deep, compressed; head profile angular; adipose eyelid not well developed; top jaw with an outer row of canines and an inner band of fine teeth; lower jaw with one row of teeth; gill rakers (excluding rudiments) 5-9 + 17-21; margin of body at rear of gill chamber without papillae; pectoral fins longer than head; dorsal rays VIII + I, 21-24; anal rays II + I, 17-20; dorsal and anal fin with long front lobes; dorsal and anal fins not followed by finlets; lateral line with a pronounced anterior arch, straight part with 27-42 strong scutes; breast completely scaled.
Head and dorsal half of body brassy, suffused with blue and covered with small blue-black spots (forming at about 20 cm length and increasing in number with size); second dorsal, anal, and caudal fins electric blue; pectoral fins of juveniles yellow.
Maximum size to 100 cm; at least 10.8 kg.
Habitat: solitary or in small schools near reefs. Juveniles sometimes in estuaries.
Depth: 0-230 m.
Indo-Pacific from East Africa to the Americas; the tip of Baja and the mouth of the Gulf of California; Costa Rica to Ecuador and the offshore islands.