Body fusiform, moderately deep and compressed, belly with a distinct keel of 28 to 30 scutes. Head length 25 to 27% of standard length; top of head without a striated area; upper jaw with a distinct median notch; gillrakers very fine and numerous. Caudal fin long, 31 to 34% of standard length. Colour: back blue/green, flanks silvery, at most a diffuse dark blotch behind gill opening but no other spots on flank.