D1 3+14; D2 absent; P1 1+13; P2 6; A 35. Body deep blue-green, shading
to brassy-gold to bright silvery on flanks; tip of dorsal fin and front of anal fin
dark; caudal fin yellow. Body elongate, strongly compressed; edge of belly
sharp but without scutes; scales very small, easily shed; canine teeth in both
jaws, two canine teeth on pre-maxillae pointing forward; anal-fin base twice
the length of dorsal-fin base; ventral fins very small.