Moderately deep bodied, upper and lower body profiles both convex; mouth at front, lower jaw a little projecting; top jaw with 3 toothed bones, no notch at center front of top jaws; gill rakers on lower limb of first arch 28-34 operculum smooth; operculum smooth without bony striae; rear edge of gill opening on body with 2 fleshy lobes; dorsal fin at about midbody, 17-18 rays, no with filament; pelvic fins present, under dorsal; anal fin base short (15-17 rays), origin well behind dorsal fin; a scuted keel along entire belly.
Iridescent blue on back, silvery on sides; a black spot behind operculum; a faint yellowish stripe on upper side.
Size: grows to 18.4 cm.
Habitat: forms large inshore schools.
Depth: 0-10 m?
Southern California to the Gulf of California to Peru; occasionally in the Galapagos.