Roughly cylindrical in shape, the Japanese sea bass has a forked tail, small eyes and a large mouth. It is silvery gray above, and silvery white on the sides.
七星鱸的體型修長，呈紡錘狀，魚尾分叉，眼小、口闊，下顎比上顎突出，背部和體側是銀灰色，腹部是銀白色。