Common names: tuna (English), albacora (Espanol), atún (Espanol)
Thunnus alalunga (Bonaterre, 1788)
Body elongate, fusiform, moderately compressed; deep body, with greatest depth at origin of 2nd dorsal fin; no fatty eyelid; teeth slender, conical; top of tongue with 2 cartilaginous ridges; 25-31 gill rakers; 2 dorsal fins barely separated; 1st dorsal XII-XVI; 8-9 finlets after dorsal and anal fins; pectoral very long (reaches well past 2nd dorsal base) and with straight point; short, forked bony process between pelvic fins; two small keels separated by large keel on tail base; well developed scaly corselet on front of body; small scales cover body behind corselet
Faint iridescent blue stripe along flank; first dorsal deep yellow; second dorsal and anal light yellow; anal finlets dark grey; tail grey, with white rear border.
Size: 152 cm.
Depth: 0-600 m.
Circumglobal, temperate; California to the tip of Baja California and the Revillagigedos, the Galapagos and to southern Peru.