Common names: jack (English), trevally (English), jurel (Espanol), pámpano (Espanol)
Gnathanodon speciosus (Forsskål, 1775)
Golden jack, Golden trevally
Body deep, moderately compressed; adults without teeth (juveniles with a few weak teeth on lower jaw); lips notably fat and fleshy; gill rakers (including rudiments) 19-22 + 27-30; dorsal rays VII+I, 18-20; anal rays II+I, 15-17; dorsal and anal fins not followed by finlets; pectoral fins longer than head; lateral line moderately arched, straight part with 17-24 scales followed by 17-26 scutes; body and breast covered with scales.
Silver grey, yellowish on belly, often with scattered black patches or spots on sides; all fins yellow; tips of tail black; juveniles and young adults silver with 7-11 black bars on body.
Size: to 120 cm.
Habitat: demersal on soft bottoms. Young act as "pilots" for sharks and other large fishes.
Depth: 0-40 m.
Tropical Indo-Pacific from east Africa to the Americas; southern Baja and the southern Gulf of California to Ecuador, Cocos, the Revillagigedos, and Malpelo. Has passed through the Panama Canal to the Atlantic.