Colour silvery, greenish, or bluish above, bright silvery to yellowish on belly. Lower fins mostly yellowish to dusky. Mouth terminal, moderately large and oblique. Chin without barbel but with 6 mental pores (median pair often set in a pit). Preopercle with few spines at angle. Anal second spine sharp, more than 2/3 length of first soft ray. Gas bladder with 2 chambers. Anterior chamber yoke-shaped without appendages, posterior chamber simple, carrot-shaped. Lapillus enlarged, about 1/2 the size of sagitta (Ref 51721).